Universal Containers wants to automatically archive all inactive Account data that is older than 3...

Both C and D are valid methods to automatically archive and delete inactive Account data that is older than 3 years1. You can use an ETL tool or the Data Loader to schedule jobs to export and delete data based on certain criteria3. Option A is not recommended because the Force.com Workbench is a web-based tool that does not support scheduling or automation. Option B is not suitable because the weekly export file from the Salesforce UI does not delete data from Salesforce.