The most accurate answer to how access to the labor of enslaved people changed the American colonial economy is:
b. it allowed the development of a consumer culture due to increased wealth.
The use of enslaved labor significantly contributed to the agricultural economy, particularly in the Southern colonies, leading to increased production of cash crops like tobacco, rice, and cotton. This wealth created by the labor of enslaved people helped fuel a consumer culture as it allowed for the accumulation of resources and luxury goods among the colonial elite.