Task: Text Completion
Input (English): The welder is held over a steel plate and moved slowly. The man pulls the welder over a copper colored piece of metal. the man <sep> (A) puts down his face guard and welds a spot on a piece of metal. (B) screws on a small flat plate and lower the metal plate to fit in the metal ring. (C) pointed at the metal piece and started welding the metal one ball at a time. (D) brushed it over the aluminum.
Output (English): A