Answer: option (D).
Explanation: Nicholas fiddled with his thumbs, because, he didn’t dare look at his sister as she towered over him.
Commas are mostly used to divide or separate parts of a sentence in order to make the meaning clear and the sentence easier to read. Commas mark a brief pause in the sentence, usually at a point where you would naturally pause if you were speaking rather than writing.
Answer:
I think D is the best answer
Explanation:
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.
His guilt about his mistreatment of the cat
He is most likely looking at the ceiling while speaking