单选题 According to the passage, one rule of bungee jumping is that you______.

A、 must have a rope tied to your ankles
B、 must jump from tall buildings
C、 should jump above the sea
D、 should keep yourself safe

【正确答案】 A

【答案解析】[解析] 细节题。第二段第二句You jump from a high place 200 meters above the ground with a rope tied to your ankles．可见[A]项是正确的。 [B]和[C]虽说也正确，但不是绝对的条件。[D]所说的安全是做什么活动都该注意的。