Answer:
D. Julia saves more in rent than she spends on commuting to work
Explanation:
As we are rational agents, we need to optimize our resources in this exercise are money and time, in the statement Julia walks to her job but does not say anything about she dislikes commuting, but Amanda dislikes that, nevertheless when she decide move to the suburb further away must be a logical decision it means that she is going to save more in rent than she spends on commuting, it's a decision that is not influence for the Amanda behaviour and the options B and C don't have sense and there are lack of information to assume that, for this the answer is D it's a stuation when she wins