What are two ways to minimize or avoid data integrity issues?

What are two ways to minimize or avoid data integrity issues?
A . Do not persist values that are derivable, such as counts and categorizations, and that are subject to change.
B . Follow the single source of truth principle (SSOT).
C . Avoid using properties that represent a version or as-of-date.
D . Store critical data within multiple tables to prevent data loss.

Answer: AB