Unless directed otherwise, you may after stopping at a red light.

a. perform a u-turn

b. turn left

c. change lanes without signaling

d. turn right

Option D, turn right

Explanation: We must complete the statement "Unless directed otherwise, you may after stopping at a red light."

In the US in most cities, you are allowed to turn right after fully stopping at a red light.

The procedure is:

Come to a full stop at the red light.

See to your left if there are pedestrians or another car coming in the way.

See to your right.

Look at your mirrors to see if someone is coming behind you, like a biker.

If there is no one coming, you can turn right.

Now the complete sentence is:

Unless directed otherwise, you may turn right after stopping at a red light.

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