Jennifer Consumes Both Apples and Bread

Jennifer consumes both apples and bread. Let P_a be the price of an apple and P_b the price of a loaf of bread. TU_a is her total utility from apples and TU_b is her total utility from bread. MU_a is her marginal utility from apples and MU_b is her marginal utility from bread. When Jennifer is in consumer equilibrium

A) MU_a/TU_a = MU_b/TU_b.
B) MU_a/P_b = MU_b/P_a.
C) MU_a/P_a = MU_b/P_b.
D) TU_a/P_b = TU_b/P_b.