Correct answer: Traffic moves only in the arrow's direction.
Answer options
AMaking a U-turn here is prohibited.
BTraffic moves only in the arrow's direction. Correct
CThey may turn either right or left here.
Why
A ONE WAY sign shows that every vehicle on that street must travel in the single direction the arrow points. Never drive against the arrow, and when turning onto the street, turn so you head the way it indicates.