Exam PT0-002 topic 1 question 390 discussion

While performing reconnaissance, a penetration tester runs Nmap and receives the following output:

Nmap scan report for samplescan.org (44.33.55.66)
Host is up (0.025s latency).
Not shown: 992 closed tcp ports (conn-refused)

PORT STATE -
22/tcp open
23/tcp open
80/tcp open
443/tcp open

Nmap done: 1 IP address (1 host up) scanned in 5.52 seconds

Which of the following ports should the penetration tester sniff the traffic on to obtain sensitive information?