Answer:
A.They all decreased voter discrimination based on race
Step-by-step explanation:
The 15th Amendment which was ratified in 1870 helped to end the discrimination of African Americans from voting as stating that it was illegal to prevent any person from voting based on his race.
The 24th Amendment which was ratified in 1964 made poll taxes- another means of preventing blacks from voting- illegal.
Therefore, the 15th Amendment, 24th Amendment, and Voting Rights Act of 1965 all similar because they all decreased voter discrimination based on race.