劳动法律行为包括（）。

A．沟通行为

B．合法行为

C．司法行为

D．违约行为

E．调解行为

Fuel oil tank vents are fitted with a screen which will stop（）.

A.oil from flowing out of the tank vent

B.air from entering the tank vent

C.vapors from leaving the tank vent

D.flames on deck from entering the tank vent