Why was Cambdia dragged into the Vietnam war?

Vietnam launched an invasion of Cambodia in late December 1978 to remove Pol Pot. Two million Cambodians had died at the hands of his Khmer Rouge regime and Pol Pot's troops had conducted bloody cross-border raids into Vietnam, Cambodia's historic enemy, massacring civilians and torching villages.

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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