The plant indigo was valued as a plantation crop because... A. It grew naturally in the swampy, lowland regions of Virginia.
B. It produced a grain that the colonists mixed with rice.
C. It yielded a deep blue dye that was highly marketable.
D. It required a lot skill and backbreaking labor to grow it.

The answer to this question is D

I believe the answer is D too

France played a key role in the american revolutionary war (american war of independence; 1775–1783). motivated by the ideals of the new nation which were inspired by the french enlightenment, as well as its long-term rivalry with britain and so as to avenge their territorial losses during the french and indian war, france secretly began sending supplies to the americans in 1775.