Final answer:
An example of a Jim Crow law is requiring a literacy test to vote, making it harder for African Americans to exercise their right to vote.
Step-by-step explanation:
An example of a Jim Crow law is requiring a literacy test to vote, which was used as a way to disenfranchise African Americans. These tests were designed to be more difficult for Black voters compared to white voters, making it harder for them to exercise their right to vote. This discriminatory practice was a part of the Jim Crow laws, which were enforced in the Southern United States from the late 1800s until 1965.