-What Controversial Topic Did William Gropper's "Automobile Industry" Mural in a Detroit

-What controversial topic did William Gropper's "Automobile Industry" mural in a Detroit post office, which glorified autoworkers and was a part of the Treasury Department's project to put artists to work during the Great Depression, leave out?

A) the deadening routine of the assembly line and the numerous strikes in this industry
B) the poverty resulting from Henry Ford's refusal to implement higher wages
C) the charity given by the states to autoworkers during the Great Depression
D) the laziness characteristic of WPA workers who did nothing and wasted time