【求助高手】求两道LSAT逻辑解释

15.   M: It is almost impossible to find a person between the ages of 85 an 90 who primarily uses the left hand.

Q: Seventy to ninety years ago, however, children were punished for using their left hands to eat or to write and were forced to use their right hands.

Q’s response serves to counter any use by M of the evidence about 85 to 90 year olds in supports of which one of the following hypotheses?

(A) Being born right-handed confers a survival advantage.

(B) Societal attitudes toward handedness differ at different times.

(C) Forcing a person to switch from a preferred hand is harmless.

    (D) Handedness is a product of both genetic predisposition and social pressures.

(E) Physical habits learned in school often persist in old age.

答案选A，我觉得选D，而且谁能翻译一下问题到底什么意思啊，谢谢

21.   Whenever a major political scandal erupts before an election and voters blame the scandal on all parties about equally, virtually all incumbents, from whatever party, seeking reelection are returned to office. However, when voters blame such a scandal on only one party, incumbents from that party are likely to be defeated by challengers from other parties. The proportion of incumbents who seek reelection is high and remarkably constant from election to election.

If the voters’ reactions are guided by a principle, which one of the following principles would best account for the contrast in reactions described above?

(A) Whenever one incumbent is responsible for one major political scandal and another incumbent is responsible for another, the consequences for the two incumbents should be the same.

(B) When a major political scandal is blamed on incumbents from all parties, that judgment is more accurate than any judgment that incumbents from only on party are to blame.

(C) Incumbents who are rightly blamed for a major political scandal should not seek reelection, but if they do, they should not be returned to office.

    (D) Major political scandals can practically always be blamed on incumbents, but whether those incumbents should be voted out of office depends on who their challengers are.

(E) When major political scandals are less the responsibility of individual incumbents than of the parties to which they belong, whatever party was responsible must be penalized when possible.

答案是E，我觉得理解不了啊，我选了D，D是多好的他因削弱啊

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