What best practice should an architect recommend?

Universal Containers has many development teams deploying into a single org. The business is very seasonal and approaching its busiest season. The business owner comes to you asking for your advice about its next major production release.

What best practice should an architect recommend?
A . Make declarative changes in production only.
B. Bypass regression testing for minor changes.
C. Avoid releasing near peak business periods.
D. Developers should conduct user acceptance testing

Answer: D