I'm not sure what the question is asking, or if you are even asking it correctly. I do know that Justice Wargrave was responsible for his own "death" (He faked it.) I also know that Wargrave decidedly killed everyone on the island depicted in the story. The answer would be Justice Wargrave, if you were asking who killed Mr. Blore and Doctor Armstrong. However, I'm not sure what you mean by who was involved in the murder of Justice Wargrave? If it helps, he seemingly faked his death so maybe that could answer your question?
Please let me know if you need more clarification.
Answer:
This is always considered a tough one, but once you get the hang of it it is pretty simple. If you have microsoft word, pages, or any writing paper program you can use an "MLA FORMAT TEMPLATE". When using this, you can usually scroll down and it shows example of citations. You can then fill in the blanks with your own information with ease.
Hope this helps. :)
Explanation:
I think A if I remember correctly
Your answer is C. A and B are stating what the whole essay's purpose is.