Answer:
The correct answer is A that is $10,000
Explanation:
Derby is the one who took the project or work for designing the ad campaign and for that the Consumer credit union (who want this work to be done) paid $10,000 to the Derby for the work.
But unfortunately, next day, the Derby informs the union that they will not perform the work as they have taken or accepted job in Boston.
Therefore, as a compensatory damages, they will (credit union) recover their amount of $10,000.