Answer:
A. Plessy v. Ferguson upheld laws that systematically denied the civil rights of Black Americans.
Explanation:
The Supreme Court's ruling in Plessy v. Ferguson (1896) upheld the constitutionality of "separate but equal" laws, which allowed for racial segregation in public facilities, including schools, transportation, and other public spaces. This decision essentially legalized racial segregation and discrimination against Black Americans, and it had a significant negative impact on their civil rights.
The "separate but equal" doctrine created a legal framework that allowed for the widespread implementation of segregation, which led to unequal treatment and access to resources for Black Americans. The ruling in Plessy v. Ferguson allowed states to legally justify segregation and discrimination, which remained in place until the Civil Rights Movement of the 1950s and 1960s.
Overall, the decision in Plessy v. Ferguson had a significant negative impact on the civil rights of Black Americans, as it upheld laws that systematically denied them equal treatment and access to public resources.