my understanding and answer doesn't match.

I dont get why Q54 answer is B when I think it is A

and I dont know how to calculate Q55 (Answer is D)

51] Suppose the govenuneau raises the price of cheese above the market equilibrium level [PD] by imposing a high minimum price and purchasing all of the same. supply from the market, and these quantities are destruyed. Based on the areas in the gure below, what is the change in producer surplus after this policy.r is adopted? A] Producers lose area C but gain area A. B} Producers lose area C but gain area A+B. C] Producers gain A. D] Producers gain area A+B+D_