Abby spends all of her income on ice cream and hand sanitizer. When Abby maximizes her utility given her limitedincome, which of the following will betrue?

A.

Abby's indifference curve will be flatter than her budget line.

B.

Abby's marginal rate of substitution will equal to the relative price.

C.

The marginal utility of the last ounce of hand sanitizer will be equal to the marginal utility of the last scoop of ice cream.

D.

All of the above will be true when Abby maximizes her utility.