Answer:
C. Ransford acted not only in self defense, but in denfense of others, so he was justified in killing Zaroff.
Step-by-step explanation:
From what I am reading I think it is C. I am not too sure but you can always try it out!
A explains details and isnt a good conclusion.
B is false
D Doesnt really wrap up the whole context and text not making it a strong conclusion
C is a good strong conclusion wrapping everything up.
I hope this helps you!