Suppose the Supply and Demand Tables Shown Reflect the Supply

Suppose the supply and demand tables shown reflect the supply and demand for milk per week. At a price of $4, there is a: $\begin{array}{|c|c|c|}\hline \begin{array}{c}\text { Price } \\\text { (per gallon) }\end{array} & \begin{array}{c}\text { Quantity demanded (gallons per } \\\text { week) }\end{array} & \begin{array}{c}\text { Quantity Supplied (gallons per } \\\text { week) }\end{array} \\\hline \$ 1 & 2,000 & 1,000 \\\hline \$ 2 & 1,500 & 1,500 \\\hline \$ 3 & 1,000 & 2,000 \\\hline \$ 4 & 500 & 2,500 \\\hline\end{array}$

A) surplus of 1,000 gallons per week.
B) surplus of 2,000 gallons per week.
C) shortage of 1,000 gallons per week.
D) shortage of 2,000 gallons per week.