A traffic officer swinging a yellow light...

A traffic officer swinging a yellow light...
A)Requires road users towards whom the officer directs the light to stop.Correct
B)Requires road users towards whom the officer directs the light to be extra cautious.
An officer swinging a red or yellow light requires road users towards whom the officer directs the light to stop.
When an officer with their arm extended moves it alternately, they are requiring us to reduce speed.