Correct Answer: D
You can generate backup files manually once every 7 days (for weekly export) or 29 days (for monthly export). In Professional Edition and Developer Edition, you can generate backup files only every 29 days. You can schedule backup files to generate automatically at weekly or monthly intervals (only monthly intervals are available in Professional Edition and Developer Edition).
Option A is incorrect because the import wizard makes it easy to import data for many standard Salesforce objects, including accounts, contacts, leads, solutions, campaign members, and person accounts.
Option B is incorrect because Data Loader is a client application for the bulk import or export of data. Use it to insert, update, delete, or export Salesforce records.
Option C is incorrect because it only lets you export all the records for a specific object. You could also use reports to export data.
Reference:
https://help.salesforce.com/articleView?id=admin_exportdata.htm&type=5