A male client with Bell’s palsy asks the nurse what has caused this problem.. Primary genetic in origin, triggered by exposure to meningitis

A male client with Bell’s palsy asks the nurse what has caused this problem. The nurse’s response is based on an understanding that the cause is:
a. Unknown, but possibly includes ischemia, viral infection, or an autoimmune problem
b. Unknown, but possibly includes long-term tissue malnutrition and cellular hypoxia
c. Primary genetic in origin, triggered by exposure to meningitis
d. Primarily genetic in origin, triggered by exposure to neurotoxins.