John is the tallest boy in the class, _____ according to him

John is the tallest boy in the class, _____ according to himself. A.five foot eight
John is the tallest boy in the class, _____ according to himself.
A.five foot eight as tall as
B.as tall as five foot eight
C.as five foot eight tall as
D.as tall five foot eight as
选什么?还有解释,麻烦在翻译一下这句话
再问一下关于as……as 结构的用法