I like the same book ______ you are reading now. Would you give it to me after you have finished it

A. as B. that
还有两个选项忘记了,但肯定不是. 所以没有去查寻.
请问各位大侠,我个人觉得是选A,因为是同一本书.
对吗?
还望赐教the same ......as 和the same ......that的用法区别?
在一本语法书上写道:如果后面的定语内容是指同一类事物则用as,
如果是同一事物则用that. 很显然, 这里指得是同一本书,为何却不选that呢?

各位大侠这么多人选A,而且给出了你们的参考资料.可是你们的资料却和你们所说的有点儿自相矛盾. 以下是你们在竞学网上关于定语从句的说明:
the same ......as 和 the same that 引导的定语从句的区别在于: 前者修饰的是与原物同样的而后者修饰的就是先行词同样的东西.试比较:
This is the same watch as I lost.
这和我丢失的那一只表一样.(不是同一只)
This is the same watch that I lost.
这就是我丢失的那一只表.(同一只)
依此类推, 此题是否应该选B呢?

that 因为是特指这一本书

例如
He said the same shit as you.
He said the same shit that you told me.

that 后跟所指的名词

选 [ A ] as

理由:

i like the same book as you are reading now. Would you give it to me after you have finished it.

我喜欢你现在正在看的同样的书. 你能否在读完后给我看.

the same...as 是固定搭配

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(4)As 的用法 the same… as; such…as 中的as 是一种固定结构, 和……一样……。
I should like to use the same tool as is used here.
We should have such a dictionary as he is using.

详情看网站:
全力直击英语语法第43讲 定语从句

B
A？说得跟真的一样…………
不过，呵呵……
the same…as为像……的一样。而the same…that为就是这个。

This is the same train that I rode on yesterday. 这就是就是我昨天坐过的那辆火车。
This is the sametrain as I rode on yesterday. 这辆火车像我昨天坐过的那辆一样。

参考资料：