Answer:
According to the text, money is spent:
B. usually on what we want and need with wisdom.
Step-by-step explanation:
The passage is describing wise shoppers' strategies to buying products. According to it, a wise shopper will buy something after looking at the type of product and the price as well. If two products offer the same satisfaction but one of them is cheaper, then the wise shopper will buy the cheaper one. In other words, he uses wisdom in order to make the best choice. Since the only alternative that mentions wisdom is letter B, it seems to be the best option.