**Core Concept**
The assessment of neonatal hearing loss involves evaluating the auditory system in newborns to detect any abnormalities that may indicate hearing impairment. This is crucial for early intervention and treatment to prevent long-term language and cognitive development issues.

**Why the Correct Answer is Right**
Otoacoustic Emissions (OAE) testing is a widely used method to assess neonatal hearing loss. It measures the sounds produced by the inner ear in response to sound stimulation. The OAE test involves placing a small probe in the ear canal, which emits a sound and records the echoes that bounce back. This test is non-invasive, quick, and can be performed on newborns in the hospital. The OAE test is especially useful in detecting hearing loss in newborns, as it can identify issues in the outer hair cells of the cochlea.

**Why Each Wrong Option is Incorrect**
**Option A:** Auditory Brainstem Response (ABR) testing is a useful method for assessing hearing loss, but it is typically used in infants and children who are too young for behavioral testing. While ABR can be used in newborns, it is not the primary test used for assessing neonatal hearing loss.
**Option B:** Tympanometry is a test used to assess middle ear function, but it does not directly assess hearing loss. It can help identify issues with the middle ear, but it is not a specific test for hearing loss.
**Option C:** Behavioral testing, such as the Visual Reinforcement Audiometry (VRA), is used in older children and adults to assess hearing loss, but it is not suitable for newborns.

**Clinical Pearl / High-Yield Fact**
Early detection and intervention of neonatal hearing loss are critical for preventing long-term language and cognitive development issues. The American Academy of Pediatrics recommends universal newborn hearing screening, which includes OAE testing, to detect hearing loss in newborns.

**Correct Answer:** C.