How should we act if our vehicle gets stuck due to ice with its wheels spinning?

How should we act if our vehicle gets stuck due to ice with its wheels spinning?
A)We will engage reverse, as it is the gear with the most power.
B)We will engage first gear and accelerate fully.
C)We will engage the longest gear ratio possible, accelerating smoothly.Correct
If our vehicle gets stuck on ice, in order to get out we must make the vehicle transmit its power as smoothly as possible to avoid spinning again. That is why we will use the longest gear possible, accelerating very smoothly.