the answer is B. to ensure domestic tranquility
The main grievance made by Civil Rights leaders during this time was that African Americans had just been asked to fight in a war for a country that didn't treat them fairly at home. The youth were mainly content until the 60s, when they were very outspoken against the war in Vietnam.
"<span>c. Its proximity to Africa and India made trade quite successful" is the best option, since a great deal of trade during this time and indeed today is done with ships. </span>
