I do agree with Johnson decision to not run for re-election in 1968. He got very tired by 1968. He lost trust since the Vietnam war and he was criticized and his health started to decline only to die 4 years after his presidency from a heart attack.
Answer:
I can answer your question for A.
Explanation:
South America and North America began to exchange goods and both of their economies prospered, and the Monroe doctrine dictated that European powers were forbidden from interfering or colonizing South America