Final Answer:
When the United States invaded Puerto Rico during the Spanish-American War in 1898, the reaction of the people varied. Overall, there wasn't a unified reaction from all Puerto Ricans.
Step-by-step explanation:
Out of the options provided option C. They joined the United States to fight the Spanish is the most accurate option.
Some Puerto Ricans did support the U.S. invasion and saw it as an opportunity to gain independence from Spanish rule. However, there were also those who resisted the U.S. invasion or were opposed to it because they didn't necessarily want to change colonial rulers. The desire for independence from Spain didn't necessarily mean automatic support for U.S. control. The sentiment among the Puerto Rican population was diverse, ranging from support for independence to resistance against any foreign rule.