求助蓝皮书上一道主谓一致题

although it claims to delve into political issues, teltvision ca be superficial such as when each of the three major networks broadcast exactly the same statemen from a political candidate.

A superficial such as when each of the three major networks

B superficial, as can sometimes occur if all of the three major networks

Csuperficial if the three major networks all

Dsiperficial whenever each of the three major networks

Esuperficial, as when the three major networks each 

B and C错在那里了

plus there +be是错的吗？

B和C错在前后意思没体现对立  each 更能表现出 not delve

B很wordy...

there be不全是错 具体情况具体分析

thank you!