A Client Takes an Aspirin,a Multivitamin,and an Antihistamine Every Day

A client takes an aspirin,a multivitamin,and an antihistamine every day.What is the most important instruction by the nurse when the client is prescribed levodopa/carbidopa (Parcopa) ?

A) You should not take the multivitamin with your levodopa/carbidopa (Parcopa) ."
B) You should not take the antihistamine with your levodopa/carbidopa (Parcopa) ."
C) You should not take the aspirin with your levodopa/carbidopa (Parcopa) ."
D) These medications are safe to take with levodopa/carbidopa (Parcopa) ."