B is the correct answer He went from saying that his old school frightened him which we can infer that he did not like the school very much nor did he have a lot of friends. He goes on to lists the things he found out about the school. In the beginning he did not want change to happen. He was afraid But when he got to know what the school was about, he got comfortable and he liked it, Hereford creating unexpected happiness.
What are the choices? If I had to choose a phrase without knowing of any choices, I would put "Bad studying" But im pretty sure thats not the answer you are looking for.
