How should we act when we encounter a red traffic light at the entrance to a tunnel?

How should we act when we encounter a red traffic light at the entrance to a tunnel?
A)We will pass through with extreme caution.
B)We will stop and wait until it goes off or changes to green or flashing amber.Correct
C)We will pass through giving way to the right and the left.
At a red traffic light, regardless of where it is located, we will stop and wait until it stops being red before we can continue.