When Receiving Report,the Nurse Learns That a Schizophrenic Patient Has

When receiving report,the nurse learns that a schizophrenic patient has been displaying waxy flexibility.Which behavior is consistent with this report?

A) The patient sits and stares at the wall without speaking.
B) The patient arranges himself in several seated postures on the couch.
C) The patient marches stiffly up and down the center of the dayroom.
D) The patient holds his arm over his head with his fist clenched for an hour.