介绍家人和朋友 — 英语选择题

介绍卡上写着：Amy是我的妹妹，Ben是我的朋友。小明要先介绍朋友，再介绍妹妹，哪句话正确？A. This is my friend, Ben. This is my sister, Amy. B. This is my sister, Ben. This is my friend, Amy. C. This is my friend, Amy. This is my sister, Ben. D. This is my brother, Ben. This is my friend, Amy.