When the marginal utility from the consumption of commodity X (Mux) is greater than the price commodity X (Px), a rational consumer should
The correct answer is: C
Explanation
A rational consumer should consume more of commodity X when the marginal utility from the consumption of commodity X (Mux) is greater than the price commodity X (Px). This is because the consumer is getting more satisfaction from consuming each additional unit of commodity X than they are paying for it. As a result, the consumer should continue to consume more of the commodity until the marginal utility is equal to the price.