【单选题】One of the most interesting experiments in electronic communication I've ever seen is coming from Wave. It's real—time e-mail. What that means is that as you're typing a message in Wave, either a new ...
A.
It makes people see each other online.
B.
It enables people to send real—time e-mails.
C.
It allows you to send more e-mails at the same time.
D.
It can be easily connected to other communication systems.