Concept: Consumer surplus is the extra benefit consumers get when they pay less than they are willing to pay.Explanation:Consumer surplus is higher when consumers are less sensitive to price changes, meaning they are still willing to buy even at higher prices.When demand is inelastic, the demand curve is steeper, so the area between the demand curve and the market price tends to be larger.When demand is perfectly elastic or very elastic, consumer surplus is small or zero because consumers will not pay much above the market price.Answer: A. inelastic