Which capability should be used?

A customer needs to update metadata for thousands of assets in AEM.

Which capability should be used?

A. Sling JCR APIs
B. Update Asset workflow

C. Import a CSV file

D. WebDav

Reference: https://www.adobe.com/content/dam/www/us/en/marketing/experience-manager-sites/pdfs/aem-assets-tips-tricks-sheet.pdf