**Core Concept**
The Foster Miller Probe is a type of electronic probing system used in otolaryngology to assess middle ear function. It detects the movement of the tympanic membrane (eardrum) and the ossicles (small bones) in response to sound.

**Why the Correct Answer is Right**
The Foster Miller Probe works by emitting a gentle probe tone through a small tube inserted into the ear canal. The probe tone causes the tympanic membrane to vibrate, and these vibrations are transmitted to the ossicles. The probe then detects the movement of the ossicles, which is an indicator of middle ear function. This is a critical assessment in diagnosing conditions such as otosclerosis, where the ossicles are fixed in place.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Foster Miller Probe is specifically designed to assess middle ear function, not inner ear function.
**Option B:** This option is incorrect because the Typanometer is a different device used to measure middle ear pressure, not movement of the ossicles.

**Clinical Pearl / High-Yield Fact**
The Foster Miller Probe is a non-invasive, painless assessment tool that helps otolaryngologists diagnose middle ear disorders. It is an essential part of the otoscopy examination.

**Correct Answer:** C. Movement of the ossicles.