When they went into the shop and asked to look at the engagement rings the girl brought

问题补充：

When they went into the shop and asked to look at the engagement rings, the girl brought out a cheaper one, she had arranged with James.

A. the which was what

B. what was that

C. which was what

D. that was that

答案：

A. the which was what

B. what was that

(答案→)C. which was what

D. that was that

解析：

C。which 引导一个非限制性定语从句，其中 which 指代 a cheaper one，且在定语从句中用作主语。which was what 中的 what引导一个表语从句，它相当于 the one that。