The market for ice cream has 50 potential consumers, each having an individual demand curve P = 5 2Qi , where P is price in dollars per ice cream cone and Qi is the number of cones demanded per week by consumer i. The market demand curve is (A) P = 5 100Q. (B) 50P = 5 2Q. (C) P = 5 0.04Q. (D) P = 250 2Q. (E) P = 0.1 0.04Q.