Why do social movements enlist the help of songwriters and well-known actors?

A. To criticize opponents
B. To get their messages across
C. To save money
D. To stabilize society

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.

The correct answer is b