Use the Following Demand and Supply Functions: Demand $Q _ { d } = 50 - 4 P$

Use the following demand and supply functions: Demand: $Q _ { d } = 50 - 4 P$ Supply: $Q _ { s } = 20 + 2 P$ If the price is $2,there is a

A) surplus of 10 units.
B) shortage of 10 units.
C) surplus of 30 units.
D) shortage of 18 units.
E) none of the above