The answer is: A. nominal
Example of a nominal damage would be when the plaintiff sue the defendant for insulting the plaintiff in a local restaurant. In such case, even if the defendant is proven to be wrong, there is no financial damage that the defendant cause to the plaintiff.
After hearing this type of cases, the court would order the defendant to give small amount of money to the plaintiff (around $1 - $2 ) as a form of recognition that defendant has did something wrong.