I am not going to answer in a paragraph of 125 words, but I will give you the answer to the first question; The United States didn't want another country to fall to communism. They officially got involved after the attack of the Gulf of Tonkin (U.S destroyers were stationed there and a radio came in that said they had been fired upon by North Vietnamese forces). (45 words BTW).
I think the answer is B. I’m not too sure though.
1. The recipie for concrete was Most, and the trade of construction was ruined
2. The government collapsed, leaving no clear schooling system.
Answer: The sinking of the Lusitania
Explanation: A German U-boat sunk it.
