I would say "a logical argument." The writer never mentions an expert opinion a statistic or a personal observation. The writer says its not worth the risk, making it logical.
Answer:
Can you please add a picture or something?
Explanation:
The correct answer must be C - what you did when you realized you broke it. This is the case because you're looking for /evidence/, so clearly D and A are not the answer. B seems plausible, but the narrative is about /how/ you broke your arm, so B is ultimately not the best answer.
Hope this helps.
Hope you’re doing well too :)