求助两道 LR FLAW 题目，谢谢。

It's not hard, but just so confusing.

1.Many mountain climbers regard climbing Mount Everest as the ultimate achievement. But climbers should not attempt this climb since the risk of death or serious injury in an Everest expedition is very high. Moreover, the romantic notion of gaining "spiritual discovery" atop Everest is dispelled by climbers' reports that the only profound experiences they had at the top were of exhaustion and fear.

Which of the following principles, if valid, most helps to justify the reasoning above?

B. Dangerous activities that are unlikely to result in significcant spiritual benefits for those undertaking them should be avoided.

E. Mountain climbers and other athletes should carefully examine the underlying reasons they have for participating in their sports.

其他选项我都可以排除，但就是B 和E 不明白为什么B 更好？

做justify 的题目，有什么原则吗？他是Strengthen的一种那应该怎么看呢？

2. Doctor: Being overweight has long been linked with a variety of health problems, such as high blood pressure and heart disease. But recent research conclusively shows that people who are slightly overweight are healthier than those who are considerably underweigh. Therefore, to be healthy,it suffices to be slightly overweight.

The argument's reasoning is flawed because the argument

A. ignores medical opinions that tend to lead to a conclusion contrary to the one drawn.

B.never adequately defines what is meant by "healthy"

C.does not take into account the fact that appropriate weight varies greatly from person to person.

D.holds that if a person lacks a property that would suffice to make the person unhealthy, then that person must be healthy.

E. mistakes a merely relative property for one that is absolute.

答案是E， 我不明白为什么，哪个是relative property 哪个又是absolute呢？？

请牛人解答，谢谢。

还是不懂。。呵呵笨。。。能不能解释详细些。。谢谢。。

2貌似懂了。

1. 选项B只是confirm了"the romantic notion of gaining "spiritual discovery" atop Everest is dispelled by climbers' reports that the only profound experiences they had at the top were of exhaustion and fear"这个premise而已。Principle题和strengthen题不同的地方就在于principle题实际上是一种变相的assumption/justify题。这种题需要你为argument提供一个没出现过的premise,一般不能直接转述已经出现了的premise.