Refer to the Figure, Which Shows Two Voltage-Gated Na⁺ Channels

Multiple Choice

Refer to the figure, which shows two voltage-gated Na⁺ channels (in blue) in the center.
What is taking place in this figure?

A) A depolarizing force is bringing the membrane closer to threshold.
B) The voltage-gated Na⁺ channels have opened, and action potential is triggered.
C) The open Na⁺ channels have created the resting potential.
D) The open Na⁺ channels have produced afterpotential.