A client with advanced Parkinson disease has undergone diagnostic testing and diagnostic imaging.

A client with advanced Parkinson disease has undergone diagnostic testing and diagnostic imaging. What are the results most likely to reveal? Question 38 options: A) Increased gamma-aminobutyric acid (GABA) B) Decreased enzyme dopa decarboxylase levels C) Degeneration of dopamine-producing nerve cells D) Brain infarcts