Question

look at the poster
the westinghouse electric and manufacturing company produced
this poster during world war ii in order to
promote the idea that working was a
womans patriotic duty.
illustrate that women were strong enough
to join the military.
show support for women while their
husbands were at war

Explanation:

During World War II, many men were away at war, leaving a labor shortage. The poster "We Can Do It!" was used to encourage women to take on jobs in factories (which was part of the war effort). It promoted the idea that working (in these industrial jobs, not joining the military as the second option suggests) was a patriotic duty for women. The third option about supporting women while husbands were at war is too vague - the main purpose was to get women into the workforce for the war production, which ties into the patriotic duty aspect.

Answer:

promote the idea that working was a woman’s patriotic duty.