That she got wet from the water that was once inside the bucket. the evidence would be the she has an empty bucket that is wet on the inside.
The WPB or War Production Board set the products that would be needed for war and they determined their pricing.
So I agree with you, the answer is A.
But I must admit I was a bit iffy between A and D but I'd still say that A is a better choice.
Hope this helped
Pues no deben rendir cuenta al director nacional de inteligencia.