In 1863 the United States government began providing which of the following to mail carriers

A．Anyone who wanted to build railroads could get some land.
B．"Land grant colleges" had land.
C．People moved to the new areas which had became states.
D．There were a lot of family farms after 1862.

A．early land policy was favorable for the expansion of the new nation
B．rich families moved west and bought land
C．there were no financial problems in building railroads in the middle of the 19th century
D．colleges in the original thirteen states could own land