​The Squarewave Provides the Welder with a Current That Allows

​The squarewave provides the welder with a current that allows the molten weld pool to _______________.

A) ​be cleaner and reduces the need to clean all of the oxides off of the underside of the weld joint
B) ​flow freely onto the base metal with minimum fusion for thinner metals
C) ​have more gas coverage of the weld at a slower flow rate
D) ​have both deeper penetration and faster solidification