No, I do not think it is realistic, because the Socs are always worrying about their image so to try and put them selves in a situation that could make them seem imperfect to others is unrealistic.
Answer: John admitted something. He was guilty.
or John was guilty. John admitted it.
Explanation: If you are studying transformational generative grammar or psycholinguistics, you encounter the ideas of "kernel sentences" "embedding" and transformations that allow basic "simple sentences" to be combined and extended.
Answers
1.) what the sun does to your skin .
2.) the first paragraph is about the sun triggering something in your skin and either making it tan or burn
3.) the second paragraph is about how to help protect your skin by making a sunscreen by mixing a few things.
4.) the answer would be C.