A vpn

A) uses the Internet to transport packets of data, but it has its own software that encrypts and decrypts the packets between the sending and receiving system.
B) is limited only to those tasks that can be done on a web page.
C) does not verify the identity of the users who sign on to it.
D) encrypts the content of web pages, and the receiving browser that initiated the connection automatically decrypts the page content to display it.

A