At point Z on an indifference curve, a consumer is presently consuming 10 units of good X and 10 units of good Y. The consumer’s marginal utilities from consuming both good X and good Y are positive. Which combination of good X and good Y could also lie on the same indifference curve as point Z?
- A9 units of good X and 11 units of good Y
- B10 units of good X and 11 units of good Y
- C11 units of good X and 10 units of good Y
- D12 units of good X and 12 units of good Y