**Core Concept**
The human ear can detect a wide range of sound frequencies, which is essential for hearing and interpreting various sounds. The **auditory system** is responsible for converting sound waves into electrical signals that are processed by the brain. Normal human hearing encompasses a specific range of frequencies.

**Why the Correct Answer is Right**
The correct answer corresponds to the typical range of human hearing, which spans from approximately 20 Hz to 20,000 Hz. This range allows humans to perceive a wide variety of sounds, from low-frequency rumblings to high-frequency squeaks. The **cochlea** and **basilar membrane** play crucial roles in sound frequency detection.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it represents a narrower frequency range.
**Option B:** This option is also incorrect as it does not accurately represent the lower limit of human hearing.
**Option D:** This option is incorrect because it exceeds the upper limit of typical human hearing.

**Clinical Pearl / High-Yield Fact**
An important fact to remember is that hearing loss can result from damage to the **hair cells** in the cochlea, which are responsible for detecting sound frequencies.

**Correct Answer:** C. 20 Hz - 20,000 Hz