American businesses in Cuba: A. Had little control over the economy.
B. Were not backed by the U. S. government.
C. Took advantage of Cuban workers.
D. Treated their workers fairly.

The answer above is correct, C. took advantage of cuban workers.

Explanation:

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.