[問題]大全test1第16題

[auguding]

In a political system with only two major parties, the entrance of a third-party candidate into an election race damages the chances of only one of the two major candidates. The third-party candidate always attracts some of the voters who might otherwise have voted for one of the two major candidates, but not voters who support the other candidate. Since a third-party candidacy affects the two major candidates unequally, for reasons neither of them has any control over, the practice is unfair and should not be allowed.
If the factual information in the passage above is true, which of the following can be most reliably inferred from it?
(A) If the political platform of the third party is a compromise position between that of the two major parties, the third party will draw its voters equally from the two major parties.
(B) If, before the emergence of a third party, voters were divided equally between the two major parties, neither of the major parties is likely to capture much more than one-half of the vote.
(C) A third-party candidate will not capture the votes of new voters who have never voted for candidates of either of the two major parties.
(D) The political stance of a third party will be more radical than that of either of the two major parties.
(E) The founders of a third party are likely to be a coalition consisting of former leaders of the two major parties.
想請教一下
何以得知答案為b呢?
為何在第3黨派加入前也沒有一個黨可以獲得1/2以上的票呢?
是這樣的意思吧!
tks~實在不太解....

[auguding]

頂頂一下~

[hwatai]

B是指,,如果在第三黨加入前，兩大黨是五五波，那麼在第三黨加入後的選情，將不會有任何一黨得到二分之一以上的選票