Which of the following contributed most to increase settlement of the Great Plains ?

A series of federal land grants

Explanation:

Congress passed a law allowing peope to claim public land and convert it to private property through homesteading. The Great Plains is the broad expanse of flat land that lies west of the Mississippi River tallgrass prairie states and east of the Rocky Mountains in the US and Canada.

i think it would be c.

hope i'm correct

explanation:

ok, but what is your question? as soon as you tell me i will answer your question : )