Which of the Following Statements Concerning Indifference Curves Is Correct

Multiple Choice

Which of the following statements concerning indifference curves is correct?

A) An indifference curve is the locus of points describing proportional price levels of the two goods.
B) Indifference curves presuppose the measurement of total utility and marginal utility.
C) An indifference curve is the locus of points representing various combinations of two goods about which the consumer is indifferent.
D) Indifference curves presuppose the validity of the "law of diminishing returns."
E) None of the above.