It would be D because it gives the most background and summary info to the questions
<span>The first steel mills in the United States were built in the Northeast. There were reasons why they were built there. The Northeast was not well suited for farming. The climate is cold, and the soil is rocky. It is very hard to farm there. As a result, the Northeast was a region with lots of industry, trade, and fishing.</span>
The correct answer is C) She recruited her brother to pass secrets to the Soviets.
The statement that explains Ethel Rosenberg's role in the espionage case is "She recruited her brother to pass secrets to the Soviets."
Ethel and Julius Rosenberg proportionated valuable, secret, military information to the Soviet Union in the times of World War II. David Greenglass, Ethel's brother, was a machinist at the Los Alamos Laboratory in New Mexico. He and Rith, his wife, passed information to the Soviets about the United States Nuclear bomb project.
The answer is China and Turkey, Because they were the two closest Countries that the Mongol armies conquered and invaded.