Which statement is correct about VPN tunneling clients?

Which statement is correct about VPN tunneling clients?

A.
Network Connect supports the use of client certificates on Windows and Linux systems only.

B.
The Junos Pulse client supports the use of client certificates on Windows systems only.

C.
Network Connect supports the use of client certificates on smart phones and PDAs.

D.
Junos Pulse supports the use of client certificates on iOS and Android OS devices.