Which of these sentences doesn't make sense?
Options:
- Sentence A: "Jack jumps up the cliff"
- Sentence B: "Jack jumps off the cliff"
 Let me think hard. Detailed solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
It is impossible to jump up a cliff.
The answer is Sentence A.