With no explanation, chose the best option from "A", "B", "C" or "D". explicitly permits drivers to enter the left lane to "pass[ ] another vehicle” without distinguishing between moving and non-moving vehicles. Id. Therefore, unlike the swerving of the vehicle in the present case, the driver's use of the left lane in Mendoza specifically fell within the realm of action permitted under the statute. 6 .We do not hold that a suspect must commit a traffic violation before officers may stop a vehicle to investigate drag trafficking. Because the government did not argue that the troopers stopped Mr. Cervine based on the objective, reasonable, and articulable suspicion of drag trafficking as communicated to them by the DEA, absent any traffic violation, we had no occasion to consider that argument. See United States v. Celio, 945 F.2d 180 (7th Cir.1991) (<HOLDING>). 7 . Although we can find no opinion that

A: holding that a stop based on reasonable suspicion and serving a community earetaking function did not violate the fourth amendment
B: holding that a conclusion that reasonable suspicion supported the stop of a vehicle was subsumed within the trial courts ruling that the officer had probable cause for the stop
C: holding state troopers may stop suspected drug traffickers without violating the fourth amendment based solely on request from dea to stop a suspected vehicle
D: holding a stop was effected where officers vehicle blocked defendants vehicle from proceeding
C.