What are some small ways in which slaves tried to challenge the slave system?

Which statement below would be the strongest evidence for the historians view

Nhow the other half lives, jacob riis: a. wrote about captains of industry. b. highlighted the benefits of the second industrial revolution. c. provided a fictional account of life in 1890. d. discussed the lives of wealthy americans. e. focused on the wretched conditions of new york city slums.

Will have the greatest effect on human health. pollution in the a. troposphere b. stratosphere mesosphere d. thermosphere