The reporter has written( )articles about air pollution hoping to call the attention of all(见下方

问题描述:

The reporter has written( )articles about air pollution hoping to call the attention of all(见下方
people to the problem
A.a series of B.a great deal of C.a plenty of D.a large amount of
该题正确答案应选A,为什么不能选C,C也可以跟可数名词复数啊请解释一下原因,

不存在a plenty of 这个词组 ,只有plenty of