Identify the correctly written compound sentences. check all that apply. 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. 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. all e-mail, even once deleted, is retrievable and, therefore, you should avoid sending sensitive information in an e-mail.

The correctly written compound sentences are :

Explanation:        

Many compound sentences are made using coordinating conjunctions(the sentence must contain a comma before the conjunction for correct punctuation). It's also possible make the transition from one clause to the other with conjunctive adverbs such as however, therefore and meanwhile. To use these you must place them after the semicolon and add a comma after the conjunctive adverb.  

E-mail facilitates collaboration between people in remote locations every time they have a device to connect and internet service available (nowadays almost everywhere) but when the comunication requires the exchange of big data must find another way to send it , like for example the cloud , where you upload the files that you need to share in a public folder to exchange information with other people . Some examples are :

Also many people prefer e-mail over phone conversations because they need to leave a written record of the topics or determined data to remember later o to have the evidence of what was shared .

what are the sentences? so we can answer the question.