A motorist should know that he/she is entering a work zone because of

A motorist should know that he/she is entering a work zone because of

(A) Diamond-shaped, orange Work zone signs
(B) A sign with a flashing arrow panel
(C) The presence of a "flagger"
(D) All of the above

Option D is the correct answer. Explanation: A motorist should know that he/she is entering a work zone because of A sign with a flashing arrow panel, Diamond-shaped, orange Work zone signs and the presence of a "flagger".