The answer is letter D.
a large group of World War I
veterans
They are the famous name of some 43,000 marchers –17,000
World War I veterans, affiliated groups and the veterans’ families assemblage, gathered in
Washington, D.C., in the 1932 (spring and summer) to ask cash-payment redemption
of their certificates of service –Bonus Expeditionary Force as it is called by
the organizers. Of the war veterans, many had been out of work since the Great
Depression begins.