Answer:
D.
Explanation:
Marginal Utility puts a numerical value on the amount of satisfaction that a consumer gets from buying an additional unit of a product or service. Therefore based on this information it can be said that the information provided in the question indicates that in order to maximize utility, Ellie should buy more of Alpha and less of Beta, mainly due to the fact that the marginal cost of Alpha is double that of Beta and both cost the same price.