They opposed it because isolationist sentiment was growing and many people feared American involvement in another war and this was how many Americans view President Wilson's goal of establishing an international peacekeeping organization after World War I. The correct option among all the options that are given in the question is option "D".
The Cold War began after World War Two. The main enemies were the United States and the Soviet Union. The Cold War got its name because both sides were afraid of fighting each other directly. In a "hot war," nuclear weapons might destroy everything.
Usually, these extra meanings are called, "connotations" since they are not explicitly stated, but the reader can take away a wide variety of meaning from them.
