**Core Concept**
The process of nerve depolarization is a fundamental aspect of neuronal physiology, where the electrical properties of neurons change, ultimately leading to the transmission of nerve impulses. This is primarily governed by the ionic balance across the neuronal membrane, particularly the concentration and movement of sodium (Na+) and potassium (K+) ions.

**Why the Correct Answer is Right**
Nerve depolarization occurs when the membrane potential becomes less negative, resulting in the opening of voltage-gated sodium channels. This allows an influx of positively charged sodium ions into the neuron, which in turn, causes a rapid change in the membrane potential. This process is facilitated by the rapid depolarization of the neuron, making it more likely to reach the threshold potential for action potential generation. The sodium-potassium pump (Na+K+-ATPase) plays a crucial role in maintaining the ionic balance, with the sodium ions being pumped out of the cell, and potassium ions being pumped into the cell.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the process of nerve depolarization.
**Option B:** While potassium ions do play a role in the regulation of membrane potential, their movement out of the neuron is not the primary cause of depolarization.
**Option C:** This option is incorrect as it refers to the repolarization phase of the action potential, where potassium ions flow out of the neuron.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the sodium-potassium pump is responsible for maintaining the resting membrane potential, and its dysfunction can lead to various neurological disorders, such as those associated with channelopathies.

**Correct Answer: C. Repolarization**