Suppose bundles A and B lie on the same indifference curve. Bundle C lies between bundles A

Question:

Suppose bundles A and B lie on the same indifference curve. Bundle C lies between bundles A and B, on a straight line that connects them. The consumer's preferences satisfy the Declining MRS Principle. Does the consumer prefer C to A and B, or does he prefer A and B to C? Explain your answer.