596. "If you wish to enter or leave a space that has an airlock what does it mean if the warning light outside the airlock is lit?"

A. The airlock is ready for entry, and you can proceed without any restrictions
B. The warning light indicates a malfunction, but it's safe to enter.
C. The airlocks other door is open and you must not try to enter until the light goes out.
D. The warning light is not relevant to the airlock operation.