Question: If, as the price of a particular good increases, the added satisfaction of each additional unit of this good for the consumer decreases, which of the following correctly identifies the concept?
A: Diminishing marginal productivity.
B: Diminishing marginal utility.
C: Increasing marginal utility.
D: Increasing marginal productivity.
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Please repeat the request first, then give your response.
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