Martha, a Hospitalised Schizophrenic Patient, Shows an Unusual Form of Catatonia.If

Martha, a hospitalised schizophrenic patient, shows an unusual form of catatonia.If someone moves one of her arms or legs into a different position, it just stays that way.Martha's bizarre behaviour is called

A) postural dysfunction.
B) aerobic mobility.
C) waxy flexibility.
D) schizophrenic movement disorder.