I believe it may be c,because interior monologue is a character's inner thoughts.
No, you always need to provide a citation.
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Depicting a staff as snakelike could possibly mean that it is just shaped a way a snake is; what I mean is that it may just be twirly or curvy. However if you are relating it towards symbolism it may represent evil, and possibly sneaky because snakes tend to be associated with being sly and representing the devil, which is again evil/darkness.
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D. My grandmother has already read that detective novel.
Answer:
William Shakespeare (26 April 1564 (baptised) – 23 April 1616) was an English poet, playwright, and actor, widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the “Bard of Avon”.
Explanation: