Identify the correctly written compound sentences. Check all that apply.

All e$-$mail, even once deleted, is retrievable and, therefore, you should avoid sending sensitive information in an e$-$mail.

E$-$mail can be an efficient way to communicate, and it makes communicating across time zones much easier.

Many people prefer e$-$mail over phone conversations, they leave a written record.

E$-$mail facilitates collaboration between people in remote locations; however, when collaboration requires the exchange of large data files, it is often easier to use web$-$based collaboration software.