161.The freeway shoulder (outer shoulder) is open for driving during specific periods. Which of the followingrules regarding shoulder use is incorrect?
(A) To avoid congestion on the main lanes ahead, you maymerge onto the shoulder at any time.
(B) When driving on an open shoulder, you should merge back ontothe main lane in an orderly manner before the end point.
(C) If not officially announced as open, theshoulder is only for use by ambulances, fire trucks, and official duty vehicles.