Question

what did the us government do to ensure there would not be any vital factory work stoppages during world war ii?
the government encouraged businesses to produce war products.
the government banned workers in important industries from taking vacations.
the government forced 200,000 businesses to join the war effort.
the government banned workers in important industries from striking.

Explanation:

During World War II, to ensure no vital factory work stoppages, the US government took measures. Banning strikes in important industries directly addressed the risk of work stoppages. Encouraging business production (first option) was a general effort but not about preventing stoppages. Banning vacations (second option) is not a main measure. Forcing businesses (third option) is not the key to stop work stoppages. Strikes by workers in key industries would halt production, so banning strikes was crucial.

Answer:

The government banned workers in important industries from striking.