Answer:the president is responsible for the execution and enforcement of the laws created by Congress. - www.whitehouse.gov
Explanation:
The answer is B <span>worried about Communist aggression in Vietnam</span>
Because he was assassinated. He was assassinated very soon after the war ended and there was no time to do everything he wanted to do. Other people took over and started implementing reconstruction ideas and eventually it turned into more exploitation and segregation and racism.
He'd already invaded France and was a the bring of war with England