描述在校帮助他人的行为 — 英语选择题

课间，Lily在学校看见同学找不到午餐盒。她陪同学一起寻找，最后在教室里找到了。哪句话准确描述了Lily在学校帮助同学的行为？A. I help my friend carry her lunch box. B. I help my friend look for her lunch box. C. I look for my lunch box at home. D. I play with my friend at school.