**Core Concept**
The action potential is a rapid change in the electrical charge across a neuron's plasma membrane, resulting from the movement of ions across the membrane. This process is essential for the transmission of nerve impulses and is mediated by voltage-gated ion channels.

**Why the Correct Answer is Right**
The action potential is generated by the movement of sodium (Na+) and potassium (K+) ions across the neuron's plasma membrane. During the resting state, the membrane is polarized, with a higher concentration of K+ ions inside the cell and a higher concentration of Na+ ions outside. When a stimulus reaches the threshold, voltage-gated sodium channels open, allowing Na+ ions to rush into the cell and depolarize the membrane. This is followed by the opening of voltage-gated potassium channels, allowing K+ ions to leave the cell and repolarize the membrane. The sequence of events is: depolarization (upstroke phase), peak depolarization, repolarization, and hyperpolarization.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not describe the action potential accurately. The action potential is not simply a change in the electrical charge, but a rapid and complex sequence of events involving the movement of ions across the membrane.
**Option B:** This option is incorrect because it does not specify the role of voltage-gated ion channels in generating the action potential.
**Option C:** This option is incorrect because it does not describe the sequence of events involved in the action potential.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the action potential is a critical aspect of neural transmission, and any disruption to this process can lead to neurological disorders, such as myasthenia gravis or Lambert-Eaton myasthenic syndrome.

**Correct Answer:** C. The rapid change in the electrical charge across a neuron's plasma membrane resulting from the movement of ions across the membrane.