If people begin to travel by air more than inIf people begin to travel by air more than in the past, what will happen to the marginal utilities of air travel and all other goods? Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. a The marginal utility of air travel will increase, and the marginal utility of all other goods will decrease. b The marginal utilities of air travel and all other goods will increase. c The marginal utilities of air travel and all other goods will decrease. d The marginal utility of air travel will decrease, and the marginal utility of all other goods will increase. the past, what will happen to the marginal utilities of air travel and all other goods