A patient with Parkinson's disease is depressed because his drug protocol of L-dopa and Sinemet is no longer controlling his symptoms. What is the best response by the nurse?
a) "You should consider alternative treatments like acupuncture."
b) "We can adjust your medication to alleviate your symptoms."
c) "Parkinson's disease is not known to cause depression."
d) "You need to increase your physical activity to improve mood."