As Miles's income decreases, his demand for vacations decreases. What type of good are vacations for William? For William, vacations are __ A. an inferior good B. a normal good C. a substitute D. a complement

## Step 1<br />The problem is about the concept of "inferior goods" in economics. Inferior goods are those goods for which demand decreases when income increases, and vice versa. This is the opposite of normal goods, for which demand increases as income increases.<br /><br />## Step 2<br />In the problem, it is stated that as Miles's income decreases, his demand for vacations also decreases. This is a characteristic of an inferior good.<br /><br />## Step 3<br />Therefore, for William, vacations are an inferior good.