What are two correct observations about this SMTP session?

Refer to the exhibit which shows the output of an email transmission using a telnet session.

What are two correct observations about this SMTP session? (Choose two.)
A . The SMTP envelope addresses are different from the message header addresses.
B. The "250 Message accepted for delivery" message is part of the message body.
C. The "Subject" is part of the message header.
D. The "220 mx.internal.lab ESMTP Smtpd" message is part of the SMTP banner.

Answer: C, D