Refer to Table 6

Multiple Choice

$$\begin{array}{l}\begin{array} { c | c | c } \text { Price } & \begin{array} { c } \text { Quantity } \\\text { Supplied }\end{array} & \begin{array} { c } \text { Quantity } \\\text { Demanded }\end{array} \\\hline \$ 0 & 0 & 300 \\\$ 1 & 10 & 250 \\\$ 2 & 50 & 180 \\\$ 3 & 90 & 150 \\\$ 4 & 120 & 120 \\\$ 5 & 150 & 90 \\\$ 6 & 180 & 50\end{array}\\\text { Table } 6.1\end{array}$$ Refer to Table 6.1,which gives the daily supply and demand schedules for cups of coffee at a kiosk in a shopping mall.If the government places a $4 per cup tax on coffee,how many cups of coffee will be bought and sold after the tax is imposed?

A) 50.
B) 90.
C) 120.
D) 150.