Gun powered and traditionally
The correct answer is the option D.
As the United States entered the World War II they have started developing nuclear projects under the orders of the president Harry Truman. WW2 represented a massive arms race and president Truman believed that the Nazis have started developing a nuclear bomb, so he ordered that the US began the same project immediately in hopes of finishing before the Nazis.
Answer:
While most African Americans serving at the beginning of WWII were assigned to non-combat units and relegated to service duties, such as supply, maintenance, and transportation, their work behind front lines was equally vital to the war effort.
