The diagram illustrates the marginal utility (MU) gained by an individual from a good at various consumption levels. The utility obtained from the final $ he spends on each good is 3 units. If the marginal utility of money is assumed to stay constant, which quantity will he buy when the price of the good is $10?
- A4 kilos
- B5 kilos
- C6 kilos
- D7 kilos