What did poll taxes and literacy tests in the New South Era have in common?

I believe B: They were both used to disenfranchise African Americans.

Explanation:

The poll taxes was to disenfranchise impoverished and minority voters. "Minority" would typically refer to ethnic groups such as African Americans, Alaska Natives, etc.

Literacy tests were used to test literacy and disenfranchise racial minorities.

answer; provide for the common defense:

answer; they both highlight the power of the situation in determining behavior;