Third person omniscient, the narrator knows how Martin is feeling and also knows what Mr Handel is thinking.
Answer:
Not 100% sure, but I think it's either B or D
I believe the correct answer is D. humorous and informal.
You can see in the excerpt that the narrator is talking about him/herself in a humorous manner by mentioning his/her eccentricities such as 'mismatched socks' etc. The tone is very light and funny, so A, B, and C would be incorrect answers.