The correct answer is "D)". When Willie deposits those $ 250 in his savings account and the other $ 100 in his checkings account he is, effectively, allocating that money as a "store of value". In other words, an asset that maintains its value without depreciating.
Regarding option <em>"A"</em>, one does not have the information about Willies marital status. Therefore one cannot infer that his household income is $55000 because we don´t know if there are other people living with him that have income.
Regarding option <em>"B"</em>, Willies income is not only used as a medium of exchange for goods but also as an asset when he puts it onto his accounts.
Regarding option <em>"C"</em>, operating on a "cash only" basis is an option. However, one could exercise other financing methods that also be considered smart. It depends on the financial status of a person.