Brenda owns a construction company that employs bricklayers and other skilled tradesmen. Her firm’s MRP for bricklayers is $22.25 per hour for each of the first seven bricklayers, $18.50 for an eighth brick layer, and $17.75 for a ninth bricklayer. Given that she is a price taker when hiring bricklayers, how many bricklayers will she hire if the market equilibrium wage for bricklayers is $18.00 per hour?

a. Zero.

b. Seven.

c. Eight.

d. Nine.