Given the task definition and input, reply with output. In this task, you will be presented with a question having multiple possible answers in Japanese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.

Question: ジョンは15歳の時、この年は何をする最初の年でした。 
 Options: A 授業を教える B 高校に上がる C とろうとする D 授業を受ける E がくしゅうしょ 

B