11. Minica’s utility function is U( x1 , x2 ) = ( x1 +2)( x2 +1), If her marginal rate of substitution is-3 and she is consuming 12 units of good x1 , How many units of good x2 must she be consuming?
(A) 15
(B) 46
(C) 24
(D) 41
(E) None of the above.

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統計： A(0), B(0), C(1), D(1), E(0) #2748701