He feels disoppointed that he got stabbed
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.
Answer:
set up (an organization, system, or set of rules) on a firm or permanent basis.
He did by using his strengths
