Albert Sabin came up with an oral polio vaccine in 1962
Answer:
1. The dictatorship-like rule of Porfirio Diaz for over 30 years.
2. Exploitation and poor treatment of workers.
3. Great disparity between rich and poor.
Explanation:
Answer:
Racial inequality was a persistent problem during the Gilded Age. African Americans, other minorities, and women struggled in a losing battle as they sought to gain equality. Following the Civil War, during the Reconstruction southern states passed laws that separated blacks and whites
Explanation: