What correctly completes this sentence?

unlike the aztec and inca civilizations, the cause for the mayan decline was

a.
disease

b.
british colonists

c.
unknown

d.
flooding

a, c, & d are correct:

they wanted lands to settle the extra population.

they wanted new markets for english goods.

they wanted to avoid civil war.

1) the answer is b

senators serve a six-year term; representatives serve a two-year term, making them more responsive to (and responsible for) voter confidence.

2) the answer is d

to serve as president, one must:   -be a natural-born u.s. citizen of the united states;   be at least thirty-five years old;   be a resident in the united states for at least fourteen years.

3) the answer is a

ella,because it is constitutionally eligible

4) the answer is c: the u.s president

the tallest building in the western hemisphere and the sixth tallest building in the world

when he becomes king