You may make a left turn on a red light from a ______ street to another ______ street unless otherwise posted.

Answer: B — One-way, one-way

Making a left turn on a red light is permitted under specific conditions. The correct situation allows a driver to turn left on a red light from a one-way street onto another one-way street, provided there are no posted signs prohibiting such a turn. This exception is designed to facilitate traffic flow and is applicable in many states. When turning left from a one-way street, the driver must ensure that the street they are turning onto is also designated as a one-way street to safely accommodate the direction of the turn. This helps prevent potential collisions that might arise from turning onto a street where oncoming traffic could be present, as in the case with two-way streets. Understanding this rule is crucial for both safety and compliance with traffic laws. Proper comprehension of these guidelines can significantly aid drivers in making informed and safe decisions on the road.