All of them were famous during this part of the century, except for A. Mark Twain. He was famous during the LATE part of the 19th Century.
The answer to this question is A. Jet streams
Jet streams are located near the altitude of the upper troposphere. It's a movement of wind that travels from one side of the planet hemisphere to another. The movement of jet streams will bring up different temperature of air which could influence the weather that exist in certain regions.
I'm pretty sure 6 countries participated in the first winter olympics hope this helps
C. Implied powers
In the U.S., implied powers<span> are powers authorized by the Constitution that, as the word "implied" said, seems implied by powers that are outspokenly stated. It was</span><span> </span>Alexander Hamilton who<span> defended the constitutionality of the </span>First Bank of the United States<span> against protests, giving life to</span><span> what has now the general statement of implied powers.</span>
It’s d or b I think cause I did this befor
