Which of the following is a sentence fragment? A. The chain of events unfolded this way: Clara and Melvin went fishing, their boat engine broke down, and a storm rolled in. B. The slogan—"Everyone needs one"—for the product. C. High above the city a balloon floated it drifted for hours on end. D. The writer furrowed his brow, glared at the paper, and, eventually, wrote.