Wise shoppers consider alternatives before buying. That means that the shoppers look at the type of product and the price. If the products have the same features, the wise shopper may choose the cheaper product. According to the text, how is money spent?

a
usually on what we need
b
usually on what we want and need with wisdom
c
usually on what we want
d
usually with alternatives

According to the text, money is spent:

B. usually on what we want and need with wisdom.

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.

i would say b. research typically uses a variety of sources