The correct answer is C.
OBJ-1.5: The Simple Mail Transfer Protocol (SMTP) uses port 25 and is an internet standard communication protocol for electronic mail transmission. Internet Message Access Protocol (IMAP) uses port 143 and is an Internet standard protocol used by email clients to retrieve email messages from a mail server over a TCP/IP connection. Post Office Protocol version 3 (POP3) uses port 110 and is an application-layer Internet standard protocol used by e-mail clients to retrieve e-mail from a mail server. Secure Shell (SSH) uses port 22 to securely create communication sessions over the Internet for remote access to a server or system.