What happens next in this paragraph?

He starts to weld the corner of the room. The man sands the corner where he was welding. He continues to weld in the same corner. the man
Options are:
(A). slackens the weld, turns off the lights and other people enter throughout the building.
(B). pushes his helmet up and replaces the wires and sands the same area again.
(C). is indicating the lights to the weld with his form.
(D). takes the paint hose and sprays the finished wall.
(B).