May I ask should not the answer be B: PQUT? $($this question is from $2019$ Cambridge A level $9708/13$

$)$ A specific tax is placed upon each bottle of perfume sold. In the diagram, S is the supply curve

before tax, S$\_($t$)$ is the supply curve after tax.

Which area represents that part of the tax revenue paid by producers?

A ORWY

B PQUT

c PRWT

D QRWU