WWl
More than 350,000 African Americans served in segregated units during World War I, mostly as support troops. Several units saw action alongside French soldiers fighting against the Germans, and 171 African Americans were awarded the French Legion of Honor.
WWII
Despite a high enlistment rate in the U.S. Army, African Americans were not treated equally. At parades, church services, in transportation and canteens the races were kept separate. A quota of only 48 nurses was set for African-American women, and the women were segregated from white nurses and white soldiers for much of the war. Eventually more black nurses enlisted. They were assigned to care for black soldiers. Black nurses were integrated into everyday life with their white colleagues. The first African-American woman sworn into the Navy Nurse Corps was Phyllis Mae Dailey, a Columbia University student from New York. She was the first of only four African-American women to serve as a Navy nurse during World War II.
B is the answer
Thy couldn’t choose freely nor were they born free
Generally speaking, it would be "a mill worker from Pennsylvania" who would most likely support Andrew Jackson, since Jackson was famously an advocate for the "common man".
Travel by water was quicker and better for long distance. However boats need to be built and are bulky. Travel by land is stealthier. Both have safety risks. Storms and jagged rock play a risk in water transportation. Land transportation can also be more exhausting, and more suspect to pillaging.
I believe it was the Stock Market Crash of 1929
