Answer:
Wallace's main argument is that he cannot but feel that these actions (bomb-testing) must make it look to the rest of the world as if the U.S. was only paying lip service to peace at the conference table.
The first Gasoline powered American automobile was made in: The late 1800s
The first Gasoline car was created by a company called Duryea Motor Wagon in Massachusetts. At that time, only an extremely wealthy people can afford it and the product is not really appealing among the mass since horse Caravan was still a much faster transportation at that time.
Pretty sure it's: Pharaoh
The Pentagon Papers "revealed that government officials had misled Congress and the American people about the war," since it was argued that President Johnson knew far more about the detailed horrors and failed strategies of the war than he let on.
The question is kind of tricky. D-Day was the code word for the Allied invasion of France, so D is definitely a possible answer. But the PURPOSE of that invasion was in part to defend Britain, which at the time was being threatened by Nazi air attacks and by a possible Nazi invasion. So A is possible as well.
The overthrow of Mussolini was certainly a factor in the Allied strategy, but the invasion of Italy, not France, was how that task was accomplished. So C is out.
There's competing evidence over how much the Allies knew about Auschwitz by the time of D-Day. Either way, the immediate purpose of D-Day was not to free the Jews from Auschwitz, though that was an ultimate result of D-Day. So B is out.
Since the question is asking the PURPOSE of D-Day, I think A is the best answer. D is more of a description of what D-Day WAS rather than an explanation of its PURPOSE.