Answer:
the assassination of Austrian Archduke Ferdinand.
Explanation:
A powerful ruling class I took this already.
Answer: He wanted to prevent the advance of Communism.
Truman reacted so strongly when North Korea attacked South Korea because he wanted to prevent the advance of Communism.
Answer: The telegraph made communication much easier, the railroad made transportation of goods and people quicker and easier. The sewing machine made life on the plains easier.
D is the correct answer. I just took this quiz not too long ago and got it right. Hope this helps
