Both Yoni and Sergei have different cultural backgrounds. For example, Sergei doesn't like people who knock on his door because it reminds him of the time when he was still in Russia. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer: most likely the last option. soliloquys are typically used to showcase the internal state of a character, that is only known by the audience and not by other characters in a play. in this case, Hamlet is hard to understand, so his soliloquy allows us to see him as he is.
hope this helped!
The answer is a common flaw
