Explanation:
I don't know about training. But General John J Pershing would become the lead General of the American Expeditionary Force in World War I. He was stationed at the border of Mexico (before the U.S. joined the war) to help dissolve issues with Poncho Villa. This experience would help when the United States would enter the war.
Answer:
c
Explanation:
they landed in roanoke but later vanished without a trace
Answer:
a. climate change
Explanation:
Kyoto Protocol is an international agreement which is an emphasis on the 1992 United Nations Framework Convention on Climate Change which is concerned and committed to reducing greenhouse gas emissions.
The Paris Agreement also talks about reduction of greenhouse gas emission. This makes the two agreements associated with climate change.
I believe it would have to be the light bulb that destroyed the first market for petroleum.
Hope it helps if I'm right!