Choose a CORRECT Statement Regarding the VPN (Virtual Private Network)

Choose a CORRECT statement regarding the VPN (virtual private network) technology.

A) VPN generally costs high on network maintenance and administration.
B) VPN allows anywhere, anytime, and any-to-any connectivity because of the Internet's ubiquity.
C) VPN lacks flexibility in adding suppliers or customers of a firm to its enterprise network.
D) VPN offers reliable quality of services (QoS) for mission-critical applications over the Internet.
E) VPN is generally safer than leased lines in transporting sensitive data.