What is a common drawback of CMC $($computer mediated communication$)$ compared to face$-$to$-$face communication?

What is a common drawback of CMC $($computer mediated communication$)$ compared to face$-$to$-$face communication?

Provides real$-$time feedback

Allows for multi$-$tasking during conversations

Often lacks non$-$verbal cues like facial expressions and body language

Facilitates asynchronous communication