1) The horizontal summationof the demands of each consumer at different price levels is called:

A) the market demand curve.

B) the price elasticity of market demand.

C) speculative demand.

D) consumer surplus.

Px PX 10 00). 10 2345 5 Qx Mary LenaPrice 70 (dollars per widget 50 Supply. S Demand, D 10 20 30 10 50 60 Quantity of widgetsPrice 70 (dollars per widget 50 Supply. S Demand, D 10 20 30 10 50 60 Quantity of widgets$ $ 4.00 $ 3.50 $ 3.00 $ 2.75 $ 2.50 $ 2.25 . .! . . . . . . .. $ 2.00 . . - $ 1.50 . . . .... .. . ... $ 1.00 . . . . . . . . . . . . . . . . . . - - . . . . . . ..... $ 0.50 D . . . . . 100 200 300 400 500 600 700 800 900 Q(berries-lb. )