​A medical assistant has knowledge of,and participates in,a scheme where a provider knowingly billing Medicare for tests and procedures not actually performed

A) ​criminal law
B) civil law

Criminal law deals with behaviors that are offenses against the public order and includes crimes like fraud. In the scenario described, the medical assistant's actions constitute fraud against Medicare, which is a criminal offense. Civil law, on the other hand, deals with disputes between individuals or organizations, typically involving private rights.