Question

why were us businesses upset by spanish reactions to the cuban revolution during the late 1800s? us businesses were afraid they would lose money that they had invested. us businesses thought that prices for goods in cuba would go down. us businesses did not want spain to become stronger economically. us businesses were afraid that cuba would stop trading with them.

Explanation:

US businesses had invested significant amounts of money in Cuba. If Spanish reactions to the Cuban Revolution led to instability or changes that affected their investments (such as property seizures, disruptions in production, etc.), they could lose their invested capital. This was a major concern for them. The other options are less likely. If prices for goods in Cuba went down, in some cases (if they were consumers of Cuban goods) it could be beneficial or at least not directly related to being "upset" in the context of investment - focused businesses. The idea of not wanting Spain to become stronger economically is not the main driver for US businesses' upset in this context compared to the direct threat to their investments. And the fear of Cuba stopping trading (while a possible concern) is secondary to the immediate threat of losing invested money.

Answer:

US businesses were afraid they would lose money that they had invested.