If a consumer buys a DVD for \$10 but was willing to pay \$18, how does this transaction illustrate consumer surplus?

• A. The consumer surplus is \$18, representing the total willingness to pay.
• B. The consumer surplus is \$8, representing the benefit gained from the purchase.
• C. The consumer surplus is \$0, as the consumer paid the market price.
• D. The consumer surplus is \$10, representing the market price.

Answer: (B)