CT Computer Corporation, a Cash-Basis Taxpayer, Sells Service Contracts on the Computers

CT Computer Corporation, a cash-basis taxpayer, sells service contracts on the computers it sells. At the beginning of January of this year, CT Corporation sold contracts with service to begin immediately: $\begin{array}{|l|r|}\hline \text { One for three months } & \$ 200 \\\hline \text { One for } 20 \text { months } & 800 \\\hline \text { One for } 48 \text { months } & 4,000\\\hline \end{array}$ The amount of income CT Corporation must report for this year is

A) $200.
B) $1,000.
C) $1,680.
D) $5,000.