Email users report that it takes more than one minute to open emails, including those without attachments. There are three email instances in three different regions hosted by the same CSP. Other applications hosted by the same CSP have no reported issues. Which of the following solutions BEST resolves the issue?
A. Confirm that the email instances have sufficient bandwidth.
B. Install monitoring software on the email instances.
C. Check the antivirus software settings and disable real-time message scanning.
D. Ensure the requested IOPS are being provided to the email instances.
