10B)

Congratulations!

Your answer is correct. Motorists can legally signal a right turn with their left arm only because there is no way to drive and signal from the passenger window. Bicyclists find that it is easier to balance and quickly look over your shoulder for traffic when using the right arm for right turns. Try it! Here is the text from CVC Section 22111(b),

"Right turn--hand and arm extended upward beyond the side of the vehicle, except that a bicyclist may extend the right hand and arm horizontally to the right side of the bicycle."

BACK.