The Graph Shown Depicts a Tax Being Imposed, Causing Demand

The graph shown depicts a tax being imposed, causing demand to shift from D1 to D2. Which areas of the graph represent the amount of revenue that is generated by the tax?

A) B + C + F + G
B) F + G + H + I + L + M + N + O
C) B + C + F + G + L + M
D) B + C + D + E + F + G + H + I + J + K + L + M + N + O + P