There are products to be sold in the factory store. Which is not correct in the following?

There are products to be sold in the factory store. Which is not correct in the following?
A. a large number of
B. quantities of
C. a large amount of
D. a great many

A. a large number ofB. quantities of(答案→)C. a large amount ofD. a great many解析：这题考查“许多”的不同表达法，a large number of 修饰可数名词，quantities of 修饰可数名词或修饰可数名词，C. a large amount of修饰不可数名词，D. a great many修饰可数名词， products是可数名词的复数，而题目中问哪个选项不对，所以选C。

这个答案应该是对的