<span>C. Renewable energy sources such as wind are preferred because they cannot be used up </span>
I believe that it was due to buying so many cannons and supplies as well as the money britain had to pay at the end of the war but thta is just a guess
The Us were able to find same Cuban products from other supplier countries, while the Cuban country had to find other suppliers.
Cuba was not able to develop a high commerce with the US and the surrounding countries were not necessarily the best ones to make business with. Cuba had the support from the former USSR until 1989 when it was dissolved. Russia continued helping but not at the same level or amount as before.