Which two actions should an architect perform in order to meet this requirement?

Universal Containers has a large number of Opportunity fields (100) that they want to track field history on.

Which two actions should an architect perform in order to meet this requirement? Choose 2 answers
A . Create a custom object to store a copy of the record when changed.
B. Create a custom object to store the previous and new field values.
C. Use Analytic Snapshots to store a copy of the record when changed.
D. Select the 100 fields in the Opportunity Set History Tracking page.

Answer: A,B