Which is true about pop3 and imap for incoming email?
both keep email on an email server by default
imap keeps email on an email server by default
neither keep email on an email server by default
pop3 keeps email on an email server by default.

IMAP keeps email on an email server by default

Explanation:

IMAP and POP3 both are email receiving protocols. These protocols used to access the emails from the email server to client inbox.

In POP3 (Post Office Protocol 3) emails are received in the user inbox. This protocol removes the emails from email servers and keep in user inbox.

While in IMAP (Internet Message Access Protocol) the message is directly access form the email server, it will not stored on the local user device.

So, the IMAP is the only protocol in which email are kept saved on email serve by default.

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.

if you suspect that your immediate supervisor, department manager, or company is engaging in something unlawful you must do your best to end the misconduct immediately while also protecting yourself, your livelihood, and your family’s future.