Kirk works hard to earn as much money as he can. He tries to be a good steward of his money, using it to buy a solid house for his family to live in, healthy food for them to eat, cars so they can get around town, and so forth. Kirk's approach to money is most consistent with which of the following metaphors that Lea and Webley proposed to explain the human motivation towards the pursuit of money?
a. instinct
b. tool
c. drug
d. bank
Answer: B