Which Condition Would Best Control for Postexposure Fog from Safelight

Which condition would best control for postexposure fog from safelight in an average-sized darkroom (6- x 8-foot) using blue or green sensitive film?

A) Using a single 7.5-watt red safelight (direct) at least 4 feet away from the film handling area
B) Using several 7.5-watt red safelights strategically placed beyond 4 feet from the film handling area
C) Using a 15-watt red safelight (direct) at least 4 feet away from the film handling area
D) Using a 7.5-watt orange safelight (direct) at least 4 feet from the film handling area
E) Using a 15-watt orange safelight and employing an indirect method