The correct answer to this question would be alternative B)"Agriculture."
Mesoamerica is a region in North America that extends from Central Mexico through Belize, Guatemala, El Salvador, Honduras, Nicaragua and northern Costa Rica.
As examples of Mesoamerican cultures we can mention the Maya, Aztecs and Olmec, all of which had agriculture based cultures.
The Treaty of Paris signed on December 19, 1898 officially ended the war. This treaty also granted the United States control of places like Guam, the Philippine Islands, and Puerto Rico.