You work as a System Analyst for ABC Inc. You are composing an e-mail message, which you want to send. However, you notice that the Send button is not visible in the message window.
What is the most likely cause of the issue?
A. The e-mail is marked as unread.
B. The e-mail account is not created.
C. A signature has been added.
D. The e-mail is a junk e-mail.
