Why did so many American workers walk out of their jobs between $1943$ and $1944?$

They sought to express moral objections to the mass manufacturing of guns and ordnance.

They were protesting the fact that the United States failed to make the destruction of German death camps a priority in its war effort.

They were protesting discriminatory hiring practices of FEPC.

They were protesting the increasing speed of the assembly line and frozen wages.

They were protesting equal pay for women and men, blacks and whites.