GMAT Critical Reasoning (CR) | Re: For several years, per capita expenditure on prescription

expenditure continued on prescription drugs even after prices for drugs A,B,C,D and E were reduced. how is this possible?

if you replace A,B,C,D and E with P,Q,R,S and T then till the next review from government profits of manufacturer will remain same i.e. expenditure would continue to be the same. By the time government ask you to reduce the prices of P,Q,R,S and T, you will come up with U,V,W,X and Y. Bingo!

Option A is correct.

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