Which Is Not an Advantage of Virtual Private Networks (VPN)for

Which is not an advantage of virtual private networks (VPN) for data communications?

A) They are less expensive than private leased lines because they use the public Internet to carry information.
B) They ensure the confidentiality and integrity of the data transmitted over the Internet without requiring encryption.
C) They can reduce communication costs dramatically because VPN equipment is cheaper than other remote solutions.
D) Remote users can use broadband connections rather than make long distance calls to access an organization's private network.