You just realized the turn signal on your vehicle is broken, and you need to signal that you're turning left. What is the correct way to do it?
A. Hold your left arm out of the window at a 90-degree angle, with your hand pointing upward to the sky.
B. Hold your left arm out of the window at a 90-degree angle with the hand pointed down.
C. Hold your left arm horizontally out the window.
D. Hold your left arm out the window pointing vertically straight up to the sky.