Which of the following best completes the diagram above?

The correct answer is C “U.S. acquisitions in the late 19th Century”.  

Explanation:

In 1898, US and Spain signed the Treaty of Paris, a document in which Spain surrendered to US, giving the territories of Puerto Rico, Guam, and Philippines.

In the same year, U.S. Government annexed the island of Hawaii (after a coup d´etat that began in 1893, finally overthrowing the government of Queen Liliʻuokalani and annexing the territory five years later)

honestly you should get that checked out because it really isn't normal

the map that was shown mostly had eastern asia highlighted. the answer would mostly likely be "the spread of communism into eastern asia set the stage for the korean war."

hopefully this .