Book recommendations?

What is the purpose of the cc option in an email? a. create a carbon copy of the message. b. save the message as a template for future use. c. send a copy of the message to one or more people. d. send a message to multiple recipients.

According to the article in wiki answer, digital communication systems have more benefits than analog systems. they are faster and more flexible, and they offer better performance than analog communication

What group of people inspired may of bartoks compositions?