198. When may the crankcase ventilation pipes or oil drain pipes of two or more engines be connnected?

A. Propulsion engines under 1000 shaft horsepower may share a common crankcase vent provided the oil drains remain separate.
B. No interconnection may be made between the crankcase ventilation pipes or oil drain pipes.
C. In most cases it is desirable and cost effective for propulsion engines to share a common crankcase ventilation and monitoring system.
D. None of the above are correct.