MsQuasimodo Has the Utility Function U(x, M)= 100x - X²/2

Multiple Choice

Ms.Quasimodo has the utility function U(x, m) = 100x - x²/2 + m, where x is her consumption of earplugs and m is money left over to spend on other stuff.If she has $10,000 to spend on earplugs and other stuff and if the price of earplugs rises from $50 to $70, then her net consumer's surplus

A) falls by 800.
B) increases by 400.
C) falls by 600.
D) falls by 2,800.
E) increases by 1,600.