The answer is D ..I had this question before
Answer: At the core of Lincoln's work were the values of liberty and equality. Those values shone through in his words. More important, they were reflected in his actions. It was his closely held principles that guided him through some of the most difficult decisions that a leader could face.
Chiefly, it was the 15th Amendment.
But if you want to get into the specifics, the <u>Voting Rights Act of 1965</u> gave African Americans the legal means to challenge voting restrictions, which greatly improved voter turnout.
- Hope this helps.
I believe the answer is B. hope this helped