[求助]LSAT Test 2

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11. "If forest continues to disappear at its present pace, the koala will approach extinction," said the biologist.                                                                                    

       "So all that is needed to save the koala is to stop deforestation," said the politician.

Which one of the following statements is consistent with the biologist's claim but not the politician's claim?

A. Deforestation continues and the koala becomes extinct.

B. Deforestation is stopped and the koala becomes extinct.

C. Reforestation begins and the koala survives.

D. Deforestation is slowed and the koala survives.

E. Deforestation is slowed and the koala approaches extinction. 

Answer is B. Why is B correct but A wrong?

15. A well-known sports figure found that combining publicity tours with playing tours led to problems, so she stopped combining the two. She no longer allows bookstore appearances and playing in competition to occur in the same city within the same trip. This week she is traveling to London to play in a major competition, so during her stay in London she will not be making any publicity appearances at any bookstore in London.

Which one of the following most closely parallels the reasoning used in the passage?

A. Wherever there is an Acme Bugkiller, many wasps are killed. The Z family garden has an Acme Bugkiller, so any wasps remaining in the garden will soon be killed.

B. The only times that the hospital's emergency room staff attens to relatively less serious emergencies are times when there is no critical emergency to attend to. On Monday night the ER staff attended to a series of fairly minor emergencies so there must not have been any critical emergencies to take care of at the time.

C. Tomato plants require hot summer to thrive. Farms in the cool summers of country Y probably do not have thriving tomato plants.

D. Higher grades lead to better job opportunities, and studying leads to higher grades. Therefore, studying will lead to better job opportunities.

E. Butter knives are not sharp. Q was not murdered with a sharp blade, so suspect X's butter knife may have been the murder weapon.

The answer is B. Can someone expain the reasoning used in both statements?

Thanks a lot!