Go back to 77-884 - Outlook 2010

Question :-

You are composing an e-mail. You want to add a signature to the e-mail. Subsequently, you want to add another signature to the e-mail. However, you are not able to add multiple signatures. Which of the following is the most likely cause of the issue?
The e-mail is a reply of a message.
The e-mail is marked as read.
Only one signature can be added to the e-mail.
The e-mail is an outgoing message.

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