Final answer:
The question is related to Law, focusing on the appropriate lane for a driver to make a left turn on a one-way road, which is the leftmost lane unless otherwise directed.
Step-by-step explanation:
The subject of this question is related to traffic laws and road safety, which falls under the category of Law. Specifically, the question pertains to the proper lane a driver must be in to make a left turn on a one-way road. The proper procedure, unless otherwise indicated by traffic signs or road markings, is for the driver to be in the leftmost lane, closest to the centerline, to execute the left turn. This is the standard rule to ensure traffic flows smoothly and safely, and to minimize the risk of collisions with oncoming traffic or vehicles in other lanes.