You could say life became easier, people no longer had to move from place to place. They could also spend time on hobbies instead of always growing food. They began to settle down in villages to a safer easier life.
The United States entered WWII after the Japanese bombed Pearl Harbor.
The correct answer is B) "Bought grain, stored it, and resold it during times of low harvest":
Following a tendency of nationalizing several industries, which included salt, iron, and liquor, emperor Wu decided to interfere with the trade of grain in 110 BC. This happened as a response from the government to eliminate speculation generated by merchants by selling previously stored grain at below-market prices.
