Which two solutionshould a data architect recommend to mitigate data quality issues?

Universal Containers (UC) is migrating from a legacy system to Salesforce CRM, UC is concerned about the quality of data being entered by users and through external integrations.

Which two solutionshould a data architect recommend to mitigate data quality issues?
A . Leverage picklist and lookup fields where possible
B. Leverage Apex to validate the format of data being entered via a mobile device.
C. Leverage validation rules and workflows.
D. Leverage third-party- AppExchange tools

Answer: A,C