Answer:
C. Send army troops to disperse the marchers.
Explanation:
The Bonus March also called Bonus Army was a march composed by WWI veterans with their families that went to Washington DC in 1932 to demand bonus payment due to wartime services.
During that period the US was in an economic hardship of the Great Depression and even though the Congress voted bonuses but they were not scheduled for payment.
When the march reached DC President Hoover sent army troops to disperse the marchers. The troops led by General Perry L. Miles destroyed their encampments and used tear gas and tanks.