What was the main reason for tent cities located throughout the United States?

a
After the 15th Amendment, African Americans were forced to sell their homes and move west onto reservations and in tent cities.
b
After the 15th Amendment, a law was passed that made it illegal for African Americans to own property.
c
After the 15th Amendment, many African Americans were evicted from their homes, refused services and forced to live in tent cities.
d
After the 15th Amendment, many Americans could not afford their homes because of the Stock Market crash and they were forces to live in tent cities.