题目内容：

There is no greater love than __ who lays down his life for his country.
A.that of a man
B.a man
C.that of a man's
D.a man's love
为什么?请详细说明每个选项,

优质解答

因为是比较两种爱.
世间没有一种爱能胜过为国捐躯的爱了.
B “爱”与“一个男人比较”,不对
C that of a man 后面不能加's,重复
D a man's love 是独立的句子,后面无法跟从句