Final answer:
The nurse should monitor the client with Parkinson's disease who is receiving carbidopa/levodopa for adverse effects, which could appear with elevated serum levels of the medication. Elevated levels of carbidopa/levodopa can lead to impaired voluntary movement.
Step-by-step explanation:
Parkinson's disease is a degenerative disorder of the central nervous system that mainly affects the muscular system and movement. The nurse should monitor the client with Parkinson's disease who is receiving carbidopa/levodopa for adverse effects, which could appear with elevated serum levels of the medication.
The correct answer is a. Impaired voluntary movement.
Elevated serum levels of carbidopa/levodopa can lead to dyskinesias, which are involuntary and abnormal movements that can include impaired voluntary movement, such as difficulty with fine motor skills and coordination.