LSAT 14-5,7,18

lll123

1. Financial success does not guarantee happiness. This claim is not mere proverbial wisdom but a fact verified by statistics. In a recently concluded survey, only one-third of the respondents who claimed to have achieved financial success reported that they were happy.
Which one of the following, if true, most strongly supports the conclusion drawn from the survey results?
A) The respondents who reported financial success were, for the most part, financially successful
B) Financial success was once thought to be necessary for happiness but is no longer considered a prerequisite for happiness
C) Many of the respondents who claimed not to have achieved financial success reported that they were happy five years ago
D) Many of the respondents who failed to report financial success were in fact financially successful
E) Most of the respondents who reported they were unhappy were in fact happy.
A怎么能够支持结论？

2. It is not correct that the people of the United States, relative to comparable countries, are the most lightly taxed. True, the United States has the lowest tax, as percent of gross domestic product, of the Western industrialized countries, but tax rates alone do not tell the whole story. People in the United States pay out of pocket for many goods and services provided from tax revenues elsewhere. Consider universal health care, which is an entitlement supported by tax revenues in every other Western industrialized country. United States government health-care expenditures are equivalent to about 5 percent of the gross domestic product, but private health-care expenditures represent another 7 percent. This 7 percent, then, amounts to a tax.
The argument concerning whether the people of the United States are the most lightly taxed is most vulnerable to which one of the following criticisms?
A) It bases a comparison on percentages rather than on absolute numbers
B) It unreasonably extends the application of a key term
C) It uses negatively charged language instead of attempting to give a reason
D) It generalizes from only a few instances
E) It sets up a dichotomy between alternatives that are not exclusive
答案：B "This 7 percent, then, amounts to a tax."什么意思，a key term又指什么？