A Nurse Working with Postpoliomyelitis Patients Knows That Most of Her

A nurse working with postpoliomyelitis patients knows that most of her patients

A) had their initial case which was severe, 10 to 40 years ago.
B) have muscle involvement in only muscle groups that were affected initially.
C) have few symptoms other than mild muscle and joint weakness and pain.
D) had a recurrence due to receiving an oral polio vaccine booster.