To assess the tympanic membrane mobility, which instrument is most appropriate for the nurse to use?

A. An audiometer is used to assess hearing ability and is not appropriate for examining the tympanic membrane. B. An ophthalmoscope is used to examine the interior of the eye and cannot assess tympanic membrane mobility. C. A pneumatic otoscope is specifically designed for examining the tympanic membrane and allows for assessment of its mobility by using air pressure. D. A tuning fork is used to evaluate hearing and vibration sense, not tympanic membrane mobility.