Wade means to walk with effort through water or another liquid or viscous substance. River contains water.is the reasoning for what question and answer pair?

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.
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Q: What could you do to a river when you go fishing?
Options:
- buy bait
- catch fish
- drop fish
- wade in
- catching fish
A: wade in