Which of these is a statement of fact?

A. The U.S.'s use of the islands after guano fever died down shows how incredible the country is at adapting to new situations.

B. Seward's views on imperialism were disgraceful even if they created opportunities for the U.S. to expand its territory and wealth.

C. Seward purchasing Alaska for the U.S. at two cents an acre was a more practical decision than claiming island territories to harvest guano.

D. The Guano Islands Act allowed the U.S. to claim uninhabited islands as territories in order to harvest and sell guano.