Both Amy and Tom Are Trained as Nurses

Both Amy and Tom are trained as nurses. Amy makes $35,000 a year working as a nurse in an emergency room in a New York City hospital. Tom makes $20,000 working as a community health nurse in New York City. Which of the following is true?

A) Tom is clearly worse off than Amy, because he earns $15,000 a year less.
B) Tom must be better off than Amy if he is willing to take a job at $15,000 a year less than Amy.
C) From this information it cannot be determined who is better off because income is an imperfect measure of well-being.
D) Even though income is an imperfect measure of well-being, Amy and Tom must be equally well off because either is free to switch jobs.