If i had to answer this question i would go with letter b for a answer
So they have something to rely on
Answer:
When it was signed in 1787, the Constitution had a preamble and seven main parts, called articles. The 15th Amendment— which was passed by Congress on February 26, 1869, and ratified on February 3, 1870 — guarantees the right to vote and guarantees that right cannot be denied based on race.
Explanation:
I hope that works for you