Units of quantityTotal utilityMarginal utility0−−110102155317241815180\begin{array}{c|c}

\text{Units of quantity} & \text{Total utility} & \text{Marginal utility} \\

\hline

0 & - & - \\

\hline

1 & 10 & 10 \\

\hline

2 & 15 & 5 \\

\hline

3 & 17 & 2 \\

\hline

4 & 18 & 1 \\

\hline

5 & 18 & 0 \\

\end{array}

The table illustrate the law of

  • A admonishing returns
  • B increasing returns
  • C diminishing marginal utility
  • D increasing marginal utility

The correct answer is C. diminishing marginal utility

It shows that when total utility is at the maximum, marginal utility equals zero.

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