The Nursing Student Asks the Instructor Why Clients with Parkinson's

The nursing student asks the instructor why clients with Parkinson's disease are not given the drug dopamine.The instructor replies:

A) "The risk for hypertension is too high with dopamine; therefore, more frequent cardiac monitoring would be required."
B) "Exogenous dopamine must be administered via intravenous infusion, which usually requires a central line and continuous cardiac monitoring."
C) "Exogenous dopamine cannot cross the blood-brain barrier, and would be of little use."
D) "In elderly clients, the effects of dopamine on urinary function can pose an unacceptable risk for renal failure."