• method of exchanging digital messages across the Internet
• Predates and was crucial to the establishment of the Internet
• Started in 1965 as a way for multiple users of a time-sharing mainframe computer to communicate with one another

The list above is describing
A. personal computers
B. the World Wide Web
C. Microsoft Windows
D. electronic mail

Electronic mail

Explanation:

Electronic mail is the exchange of messages between people using electronic devices. Electronic mail predates and was also crucial to the establishment of the Internet.

Electronic mail (E-mail) started in 1965 as a way for the multiple users of a time-sharing mainframe computer to communicate and send amesages across to each other.

what are the choices?

d is the best answer for this question.