A consumer has a budget of $10 to spend on apples and oranges. If the marginal utility of the last apple consumed is 20 utils and the price of an apple is $2, while the marginal utility of the last orange consumed is 15 utils and the price of an orange is $1, which of the following statements correctly classifies the consumer's spending behavior?

To understand the consumer's spending behavior, we need to look at the marginal utility per dollar spent on each fruit. For apples, the marginal utility is 20 utils, and since they cost $2, the marginal utility per dollar is 10 utils ($20/2). For oranges, with a marginal utility of 15 utils and a price of $1, the marginal utility per dollar is 15 utils ($15/1). Since the consumer gets more utility per dollar from oranges than from apples, it makes sense for them to buy more oranges to maximize their total satisfaction within their $10 budget. Therefore, the consumer is not spending in the most efficient way, as they should focus on buying more oranges rather than apples.