What was one way that the introduction of cash crops affected the american colonies?

The correct answer is D. The number of slaves increased, while indentured labor by Africans decreased.

Cash crops like tobacoo, rice, indigo, cotton, etc. all helped increase the number of slaves. This is due to the fact that slaves were considered property and the owners of slaves could treat them however they want. This was much cheaper and easier than using indentured servitude. This is because indentured servants were guaranteed a piece of land after only 4-7 years of labor.