I believe c is the answer because the word it's is saying it is
You should be introducing all of you evidence in the introduction. So D.
One of the first exchanges, the horse.
By European travelers going to the tip of Africa and then coming back across the sea to America and the slaves were bought by colonists.
The British<span> were led up the hill by General </span>William Howe<span>. The Americans were led by Colonel </span>William Prescott<span>.</span>
