Consideration usually consists of an act or a promise to perform an act

The "checks and balances" system in the United States is based on a(n) __________, which means that usually no one part of the government can act without the possibility of being reversed by another part of the government

Fill in the blank(s) with correct word

Which of the following is correct?

A) Middle-aged people vote more than the young or the very old. B) Voting and political participation increase slowly with age, peak in the mid-forties and fifties, and decline after sixty. C) By 2004, the percentage of women who vote was higher than that of men. D) All of the above. E) Only A and C are correct.