Answer: C. They stimulated economies across Europe,
Explanation:
As a result of increased demand for American agricultural produce from Europeans, investors prospered and Governments were able to fund a development in sea power.
Going from an economic perspective all the above will lead to economies prospering. Forgive me for going a bit technical but here is how it works.
The Economy's performance can be measured by something called the Gross Domestic Product (GDP) which can be divided into 4 components being Consumption, Investment and Government spending.
Consumption spending is when people buy more goods and services which the Europeans were doing by buying more American goods.
Investment is putting money up for a venture so that you may make a return which again Europeans were doing in the Americas and they were gaining returns.
And Government spending. When this happens, the Government will create new jobs and buy things in the economy thus spreading money in the economy which is what European Governments did by spending on sea power.
All the above will lead to an increase in GDP which translates to a growing economy which shows that economies across Europe were stimulated.