By total consumer surplus economists mean (in P-Q space)?

(A) The area of the triangle formed by the demand curve, the price axis and the
equilibrium price line.
(B) the area between the average revenue and marginal revenue curves.
(C) the difference between the maximum price the consumer is willing to pay for a good
(vertical-intercept of demand curve) and the minimum price the producer is willing to
sell at (vertical intercept of supply curve).
(D) A and C.