Write a multi-choice question for the following article: Article: Li Ting, Zhang Lin and Wu Jun are students of Class 1, Grade 7 in Sunshine Middle School. Li Ting is a pretty girl. She has big eyes and a small nose. Her hair is long and black. She likes dancing and singing. We all like listening to her songs. She hopes to be a singer when she grows up. Zhang Lin is a tall and helpful girl. She is good at all her subjects. She always helps her classmates with their homework. She is very clever and almost knows about everything. Her classmates all call her encyclopedia . Wu Jun is a strong boy. He enjoys playing sports. He plays football and basketball very well. He is a member of the School Sports Club. His dream is to be a football player like Raul.
Question: Li Ting and Wu Jun are _ .Options:A in different classesB in different schoolsC classmatesD sister and brotherAnswer:C