The correct answer is D.
OBJ-4.9: The RDP (remote desktop protocol) is a Windows feature that allows a remote user to initiate a connection at any time and sign on to the local machine using an authorized account. This connection allows a Windows administrator to see and control what is on a remote computer’s screen. RDP authentication and session data are always encrypted. This means that a malicious user with access to the same network cannot intercept credentials or interfere or capture anything transmitted during the session. Secure Shell (SSH) uses port 22 to securely create communication sessions over the Internet for remote access to a server or system. Telnet uses port 23 to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection but sends its data in plaintext making it an insecure protocol. Virtual Network Computing (VNC) is a cross-platform screen sharing system that was created to remotely control another computer from a distance by a remote user from a secondary device as though they were sitting right in front of it.