Task: Text Completion
Input (English): Two males are outside at a kids park with a red slack line attached to the equipment at the park. the young man <sep> (A) begins to tight rope the line while bare foot and wobbling across the sand. (B) begins to perform with the slack line in various kinds of skating ways and then lanes. (C) is riding his " rota " with a frisbee attached to a chain while the young man is riding on his " rota " cable car. (D) pulls on the slack line who shows he's put it in the water to jog and then he remembers to pull it back with the butt of his uniform and a helped man helps him attach it back to the equipment in the water.
Output (English): A