Write the next sentence in the following story.

A man is wearing protective gear inside a workshop. He is welding a piece of metal with a machine. he

Options are:
[A]. continues working while sparks are flying.
[B]. uses a piece of metal to construct a door.
[C]. picks it up and tightens it against his thigh.
[D]. is using the machine's energy for building a fire.. The answer should be
[A].