C-Sinking of the uss maine, delome letter, desire for raw materials.
Explanation:
The American "yellow press" had been building public opinion support for an intervention by publishing shocking and alarming stories about the abuses and cruel treatment of the Cuban population by the Spanish authorities (which were true, an independence war was being fought in 1898 on the island). Worried about important American investments, the government sent the USS Maine to Havanna to protect them and US citizens. In a very dark incident, it blew off in the Havanna harbor.
US businesses had gone global. There was already an industrialized economy that demanded more raw materials and new markets for expansion.
All of these are reasons for the US getting involvement in the Spanish-American War.
The immigrants who came to the United States between 1870 and 1915 were seeking a better life. They were fleeing poverty and looking for new opportunities.
