Eliminate B and C immediately. The word integrated means to combine or bring things together, which makes the answer choice D wrong. The best choice is A. I hope this helps.
Answer: What two factors led to the growth of trans-Saharan trade? The two factors that led to the growth of trans-Saharan trade were the introduction of the camel and the spread of Islam. ... Travel across the Sahara was challenging because the journey was long and travelers could lose their way or be unable to find water.
