Unrestricted submarine warfare is the practice of using submarines to attack and sink all forms of enemy shipping, whether they are military or civilian. It is most closely associated with the First World War when Germany's decision to use USW brought the US into the war and led to their defeat.
I'm pretty sure this statement is true, but you may want to do some research on it. <span />
The Manhattan Project was B) The plan to develop atomic bomb.
The Manhattan Project was an examination/advancement project to construct the first nuclear weapons. During the date of the testing, World War II was taking place. A pair of atomic devices were made during the war, but that is not all the project consisted of. Another part of the project centralized on gathering knowledge of the German nuclear weapon project as well.
