You are the IT administrator of a company with a Microsoft 365 subscription and Microsoft Defender Plan 1 licenses. During your summer holiday you received a report of an email that was put in quarantine suspected of containing malware. 20 days later you are back in the office and open the quarantine page to investigate the message. You discover that it is missing. 
What could be the reason? 

Answer options:

A.Messages containing malware are automatically released to the users email junk box after 10 days.
B.You must upgrade to Defender Plan 2 to view the message.
C.Messages that contain malware are retained for 15 days before being deleted.
D.Messages that contain malware are deleted immediately.

Correct Answer: C 
The default retention period for messages that contain malware are 15 days. In this scenario the message that was put in quarantine during the holiday, would now be deleted.Option A is incorrect. This is a false statement.
Option B is incorrect. Upgrading to Defender Plan 2 is not required.
Option D is incorrect. Messages that contain malware are retained for 15 days.
Reference: 
To know more about enabling password reset, please refer to the link below: 

https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/manage-quarantined-messages-and-files?view=o365-worldwide