Broadly speaking, Mercantilism was very good for European countries for a while but terrible for their colonies.
Mercantilism made people in the Old World VERY rich.
But, as a result of the imbalance, the relationship between the European countries and their colonies deteriorated making mercantilism good in the short term but bad in the long term.
Answer:
We know that the south did not have support from Britain and France is not true.
We know that there was an abundance of cotton in Southern States
We know that Southern states did not have an abundance of industry
I am going to go with Abudance of Cotton
Explanation:
The rest of your question is
Which circumstance led the Confederacy to think that it could purchase weaponry and supplies to use in the Civil War?
A)increased taxation on Southern states
B)support from Britain and France
C)an abundance of cotton in the Southern states
D)profits from the large number of industries
A, C D those are correct i think