Cher's marginal rate of substitution of earrings (E) for necklaces (N) is 5 (MRSEN = 5). This information implies that:
A. the slope of the indifference curve is 5 and thus upward sloping.
B. Cher should own 5 times as many necklaces as pairs of earrings.
C. Cher is willing to trade away 5 necklaces for one more pair of earrings, holding her utility constant.
D. Cher will move to a higher indifference curve if she trades away 5 necklaces for one more pair of earrings.