If the utility function (U) between bananas (B) and jam (J) can be represented as U(B,J) = 3ln(B)+4ln(J), what is the marginal rate of substitution (MRS) between bananas and jam?
A) 4B.
B) -3J/(4B).
C) 4/(3J).
D) 3B/J.
ANSWER
B
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