When will people on Twitter typically see a First View campaign in their timeline?

The first time they log in to Twitter across desktop and mobile devices from 12am to 11:59pm the day of the campaign
One specific time at the day of the campaign, as chosen by the advertiser
Specific times throughout the day of the campaign, as chosen by the advertiser
Every time they log in to Twitter across desktop and mobile devices from 12am to 11:59pm the next day of the campaign

The correct answer is:

The first time they log in to Twitter across desktop and mobile devices from 12am to 11:59pm the day of the campaign.