It promoted the (relatively) rapid diffusion of immigrants, language, and domesticated crops and animals. Those factors are examined in excellent detail in Jared Diamond's book, "Germ, Guns and Steel" which I highly recommend for anyone studying the development of world cultures. It's a long read, but well worth it.
Communism, Fascism and the New Deal were all strong during the Great Depression. However, Monarchies would be the choice that was not strong during the Great Depression.
Singapore is the correct answer.
<span>A. because many Americans feared that Japanese Americans were spies.</span>