Which three recommendations should a Solution Architect make to reduce customer impact?

AC Computers is getting ready to go live with automated subscription invoicing using Sales Cloud and Revenue Cloud. AC Computers’ primary goal is to retire its homegrown system used for manual invoicing and migrate any outstanding bookings. The company wants to make sure there is little disruption to a customer’s current invoicing schedule when it goes live with Salesforce Billing and retires the existing system.

Which three recommendations should a Solution Architect make to reduce customer impact? Choose 3 answers
A . Migrate all historical payment methods from the homegrown system.
B. Utilize the standard user adoption reports and dashboards to track invoice data.
C. Provide training and enablement for end users and admins prior to go live.
D. Compare invoices as produced in both systems to ensure customer invokes are as expected.
E. Create a release and change management process to incorporate feedback and fix issues.

Answer: C,D,E