Which statement about african slavery is true? 1.slavery and a slave trade existed in africa before europeans came. 2.slavery existed in africa before europeans came, but africans did not trade slaves. 3.the trans-atlantic slave trade introduced slavery to africa.

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.