All the following are advantages of e-mail message over v-mail message except ______.

A．the use of an v-mail represented a big leap in computer application
B．the computer technology was readily adaptable to recreational activities
C．computer-to-computer information had to be digitalized before it was sent out
D．the computer had to go through big technological innovations before it was used for interpersonal communication

A．the latest developments in computer technology
B．public attitude towards the use of e-mail and v-mail
C．the criteria for determining public preference to e-mail or v-mail
D．the advantages of e-mail over v-mail as a means of communication