Which aspect of the African slave trade is illustrated by this passage?

The next morning we left the house, and continued travelling all the day. For a long time we had kept the woods, but at last we came into a road which I believed I knew. I had now some hopes of being delivered; for we had advanced but a little way before I discovered some people at a distance, on which I began to cry out for their assistance: but my cries had no other effect than to make them tie me faster and stop my mouth, and then they put me into a large sack. They also stopped my sister's mouth, and tied her hands; and in this manner we proceeded till we were out of the sight of these people.1

A. African families were often torn apart by capture and enslavement.

B. Africans were often secretly kidnapped before being sold into slavery.

C. Slave traders were mainly interested in capturing grown men who could perform heavy labor.

D. The treatment of African slaves was often uncomfortable and unjust, but rarely violent.