求助, 非常郁闷的三道题....

Last August the XT chain of gasoline stations had a temporary sales promotion in effect. In the promotion, any customer who made a purchase of ten or more gallons of gasoline was entitled to a free car wash. For the month of August, XT experienced a ten percent increase in gasoline sales as compared to sales in August the previous year, so evidently the promotion was successful as a means of boosting sales.

In evaluating the argument, it would be most helpful to answer which of the following?

A.      In the areas in which XT’s gasoline stations operate, how did total combined gasoline sales for all gasoline stations last August compare with sales for the previous August?

B.       Was the money that XT earned from the increase in gasoline sales enough to offset the cost of providing free car washes during the promotion?

C.      Were there any customers who bought ten or more gallons at an XT gasoline station during the promotion who would have or more gallons at an XT gasoline in lower quantities, but more frequently,
  if the promotion had not been in effect?

D.      Did XT or any of its gasoline stations have to pay other businesses to provide the car washes that customers were offered in the promotion?

E.       Are XT’s gasoline sales in August usually significantly higher than one twelfth of XT’s annual gasoline sales?

看到答案选A, 但是怎么觉得A说的话原文里已经说过了呢.

为什么B不对的?

Several ancient Greek texts provide accounts of people being poisoned by honey that texts suggest was made from the nectar of rhododendron or oleander plants. Honey made from such nectar can cause the effects the texts describe, but only if eaten fresh, since the honey loses its toxicity within a few weeks of being made. In Greece, rhododendrons and oleander bloom only in springtime, when they are the predominant sources of nectar.

Which of the following, if true, most strongly support the accounts of Greek texts?

A.      There are no plants that Greece in ancient times that produce more nectar than rhododendrons or oleanders does.

B.       In areas where neither rhododendrons nor oleanders grow, honey is never poisonous.

C.      A beebive’s honeycomb cannot have some sections that contain toxic honey and other sections that contain nontoxic honey

D.      The incidents of honey poisoning that are related in the ancient texts occurred in the springtime or in the early
        summer

E.       Whether the honey in a beehive is toxic depends solely on which plants
        were the source of that was used to make the honey.

这题大家觉得该选B 还是D啊? 我怎么觉得该选B啊....

再加一题....最近对自己越来越没信心了....

The sense of delayed gratification, of working now for later pleasure, has helped shape the economic behavior of our society. However, that sense is no longer nurtured as consistently in our children as it once was. For example, it used to take a bit of patience to put together the toys that children got in cereal boxes; now the toys come from the boxes whole.

Which of the following is an assumption of the passage above?

A.      The toys in cereal boxes have changed partly because the economic conditions of our society have improved.

B.       The influence of promotion gimmicks on the economic behavior of our society has increased over the years.

C.      The toys that used to come in cereal boxes were put together by the same children who played with them.

D.      Part of the pleasure of any toy lie in putting the toy together before playing with it.

E.       Today's children do not expect a single toy to provide pleasure for a long period of time.

怎么感觉该选D啊.....