How should you tell an advertiser to do a bulk creatives upload in Display & Video 360?

Through a spreadsheet template, the Display & Video 360 API, or by uploading the creatives directly to Display & Video 360.
Through the Display & Video 360 API or a spreadsheet, as you can’t upload creatives directly into Display & Video 360.
Through a structured data file or a spreadsheet template in Display & Video 360.
Through Display & Video 360, using it to upload the creatives directly.

The correct answer is:

Through a spreadsheet template, the Display & Video 360 API, or by uploading the creatives directly to Display & Video 360.