Which of the following safeguards does Twitter employ to protect brand safety?

Twitter will only run In-Stream Video Ads before one of 200+ brand-safe partners.
Twitter uses Twitter Polls to collect user feedback on video inventory.
Twitter runs algorithmic and manual checks to ensure ads are not aligned with content that falls outside of brand safety guidelines.
Twitter only runs ads on user generated content offering limited brand safety.

The correct answer is:

Twitter will only run In-Stream Video Ads before one of 200+ brand-safe partners.
Twitter runs algorithmic and manual checks to ensure ads are not aligned with content that falls outside of brand safety guidelines.