The correct answer is A) will not jam on the mooring line. The main advantage of a Chinese stopper over a one-line stopper is that it is less likely to jam on the mooring line. The Chinese stopper uses a continuous loop of line that can slide freely, whereas the one-line stopper relies on a fixed knot that can become stuck if the line is under heavy tension. This makes the Chinese stopper a safer and more reliable option for securing a mooring line, especially in situations where the line may be under significant strain. The other answer choices are incorrect because: B) the Chinese stopper is not inherently safer to use under heavy tension, C) it is not necessarily stronger than a one-line stopper, and D) while the Chinese stopper may be easier to use under heavy tension, this is not its main advantage over the one-line stopper.