I want to know the answer to the following question:
In the 1840s, what country could no longer adequately supply the British cotton mills?
All the background I'm provided with is that "This, coupled with the emergence of American cotton as a superior type (due to the longer, stronger fibers of the two domesticated native American species, Gossypium hirsutum and Gossypium barbadense), encouraged British traders to purchase cotton from plantations in the United States and plantations in the Caribbean.". Is that enough to answer the question?