What would be the best title for this list?

O A. Signs of the Great Depression?
O B. New Peacetime Technologies?
O C. Sources of Political Technologies?
O D. Effect of World War ll?

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

Transcendentalist walt whitman captured the spirit of young america by creating

Who was the first female secretary of state?