I believe the centers of learning and art in the early middle ages were in monasteries.
The correct answer here is the last option
Mahan argues clearly that a strong navy is required in order for United States to expand far beyond its shores and its territory in order to become a super power. Manifest Destiny is a belief that first referred to the destiny of the settlers to spread across North America and later beyond. Here Mahan says that in order to do that the government needs to provide supply points for its navy.
<span />
The U.S. reluctance to send Americans to fight in foreign countries for fear of getting the U.S. involved in another Vietnam is called "D<span>. the Vietnam syndrome," since the Vietnam War was viewed by many as being a foreign policy disaster. </span>
Answer:
The Americas brought gold, silver, rice, potatoes, pineapples, strawberries, tobacco, beans, vanilla, chocolate and syphilis to Europe. Africa has also imported slaves to America.