To explain Or go further into detail to your understanding.
I believe it is the second answer, "why did you interfere? your arm allowed him to stab me". Hope i helped !
"B. By the light of the moon, I tripped over a <span>rock" would be the only sentence with a dangling modifier, since in this case it is unclear what exactly is being modified, since the moon light and the tripping incident could be two, separate events in time. </span>
At Evening it hath died away. 100% correct answer.