(mc)which of the following describes one effect the united states' entrance into world war ii had on minority groups? increased job opportunities for african americans lessening of the immigration restrictions for japanese citizens reduction in racial tension between whites and mexican americans decreased job opportunities for women who were needed at home

This looks like a trick question, so, the best way to answer it would be by elimination:

Choice B is absolutely wrong. America’s entry into WWII was prompted by Japan’s attack on Pearl Harbor, and caused an immediate backlash against Japanese-American citizens.

Choice C is obviously wrong, since the relationship between Americans and Mexicans had nothing to do with WWII at the time.

Choice D is also wrong since women prospered during WWII. Since all the men had gone off to fight, industries needed workers more than ever as they were a important part in producing machinery for the war. Women were the only ones to fill these roles, and played a big part in manufacturing.

So, Choice A is the most logical decision.

The answer is A.  increased job opportunities for African Americans :)