How did triangular trade benefit european colonies in the americas? by supplying them with raw materials by alleviating population pressures by removing sources of competition and conflict by providing them with manufactured goods

The answer is b. ur welcome 

I think it's A. By supplying them with raw materials.
The Triangular Trade was an efficient system where the American Colonies, Africa, and the Caribbean all traded manufactures, crops, and slaves with each other.

Note: I could be wrong about the answer. My first guess was D. By providing them with manufactured goods, but was doing a little more research and am now leaning towards A. Just know that I too am unsure of the answer so I may not be the most reliable source.