What should a Consultant recommend to address this issue?

Universal Containers has recently set up an email-to-case channel for customers to submit case. However, they are having trouble tracking and relating email responses to the related Salesforce case.

What should a Consultant recommend to address this issue?
A . Insert a reference Thread ID in the email subject template
B . Use Omni-Channel to automatically route inbound email
C . Assign a user to manually manage incoming email
D . Convert to an On-Demand Email-to-Case setup

Answer: A