Mr Smith is __ father. A.Jacks and James B.Jack's and James' C.Jack and James' D.Jack's and James答案是C,请问有没有错,我觉得是Jame's,请教各位高手,说一下理由,菜鸟不懂.求解!

Mr Smith is __ father. A.Jacks and James B.Jack's and James' C.Jack and James' D.Jack's and James答案是C,请问有没有错,我觉得是Jame's,请教各位高手,说一下理由,菜鸟不懂.求解!
Mr Smith is __ father. A.Jacks and James B.Jack's and James' C.Jack and James' D.Jack's and James
答案是C,请问有没有错,我觉得是Jame's,请教各位高手,说一下理由,菜鸟不懂.求解!

Mr Smith is __ father. A.Jacks and James B.Jack's and James' C.Jack and James' D.Jack's and James答案是C,请问有没有错,我觉得是Jame's,请教各位高手,说一下理由,菜鸟不懂.求解!
选C.表示Jack和James 同有一个父亲.
又如：
Mary and Lily's room （两人共用一间房）
Mary's and Lily's rooms （两人分别住一间房）

答案是C没错.
名词的所有格,如果是2个人, 's, 要加在第二个人的后面