D. Crowded, unsanitary living conditions in tenements
When I think of the word liberation I think of freedom. Liberty is a basic right every American should have.
Bacon believed that the scientific method proved things to be right or wrong. He set up an approach in believing everything to be false until you prove it to be true which was called inductive reasoning.
The most significant thing about Obama's election in 2008 was that he was the first black president to ever hold the presidency.