【单选题】Ben consumes soda and cheeseburgers. If his marginal utility from sodas is currently 20, and his marginal utility from cheeseburgers is 10, and the price of cheeseburgers is twice the price of sodas,
A.
Ben is in equilibrium.
B.
Ben should increase his soda consumption and decrease his cheeseburger consumption.
C.
Ben should decrease his soda consumption and increase his cheeseburger consumption.
D.
we cannot conclude that any of the above are correct.