请教一个问题

phoenixfr

Although it claims to delve into political issues, television can be superficial, as when the three major networks each broadcast exactly the same statement from a political candidate.

上面划横线的是正确答案，有几个选项错误的原因是each of the three major networks 与复数谓语动词broadcast主谓不一致。

但答案的each也是单数啊~请大虾帮忙解释

rhine521

LZ

 each of + 复数名词     用谓语动词单数

 复数名词\代词 + each   用谓语动词复数