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.

It's 1- Slavery and a slave trade existed in Africa before Europeans came.

Explanation:

I'm sure because I just did it on Edge

the anterior pituitary gland produces the following hormones and releases them into the bloodstream: psychotropic hormone, which stimulates the adrenal glands to secrete steroid hormones, principally cortisol. growth hormone, which regulates growth, metabolism and body       hope i

a system of cooperative federalism emerged, as the powers of the federal government expanded.