Answer:
marginal benefit of a dollar of consumption today is greater than (or equal to) the marginal benefit of spending a dollar plus interest in the future.
Explanation:
A rational consumer should consume more today when the marginal benefit of a dollar of consumption today is greater than (or equal to) the marginal benefit of spending a dollar plus interest in the future.
A rational consumer should continue to consume up until the point where the marginal benefit of a dollar of consumption today is equal to the marginal benefit of spending a dollar plus interest in the future
If the marginal benefit of a dollar of consumption today is less than the marginal benefit of spending a dollar plus interest in the future, a rational consumer should postpone consumption until the future.