Answer: Franklin Roosevelt
It was initially Franklin Roosevelt who allowed and made a decision to develop the atomic bombs to which President Truman finally decided to drop. The Manhattan Project was also part of the many initiatives by Franklin Roosevelt.
The one and only Adolf Hitler. He was too prideful to lose the war, it would bring great shame to his people, and himself. He didn't want to see that happen, so he took his own life. Would've been cool if it was seppaku, though, wouldn't it? Hope I helped.
Answer:
The publication of Copernicus' model in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), just before his death in 1543, was a major event in the history of science, triggering the Copernican Revolution and making a pioneering contribution to the Scientific Revolution.
The correct answer to your question would be D - A trade policy that encourages exports while discouraging imports, mainly through tariffs.
The reason why this is the answer is because protectionism in its essence tries to restrain, limit and make trade less prominent between two nations by doing exactly that; encouraging exports and discouraging imports. This can be done in many ways. The idea behind this is that this serves and protects the interest of one nation (the protectionist one) and "evens out" the trading playing field.