It increases as they need to ship supplies to the army for medical uses or ammo such like. They need to rapidly produce weapons and ammo so that they can continue to fight on. Medicine such as penicillin was mass produced as it stopped infection rate so the mass production of that drug helped in ww2
Really hope this helps :)
I think that the answer is deficit spending
Well, the only one that actually makes sense to me is C.
I believe it is B if im wrong forgive me.
