橘皮加强题

because incumbent member of congress are given a great deal of attention by the news of median and because they enjoy such perquisites as free mail privileges and generous travel allowances, incubents enjoy an overwhelming advantage over their challengers in election for the united stateds congress.

which of the following, if true, best support the claim above?

A in the last congressional elections, incumbents met with a lager number of lobbyists than did challengers.

B in the last congressional elections, 98 percent  of the incumbents inthe house of rrepresentatives tho were seeling reelection won

C incumbent members of congress are frequently critical of the amountof attention given to them by the news median

D the support that political station action committees provide to challengers for congressional seats often compensates for the perquisites enjoy by incumbent members of congress.

E of all incumbent senators surveyed befor  the last congressinal elections, 78 percent said that their challengers did not pose a serious threat to theor chances for reelection.

the answer is A,would you tell me the reason, thank you!!