Kim Kardashian is interested in studying the phenomenon of selfies more deeply. She randomly selects 20 of her Instagram followers' feeds. For each selected feed, she records the number of selfies...

Kim Kardashian is interested in studying the phenomenon of selfies more deeply.  She randomly selects 20 of her Instagram followers' feeds.  For each selected feed, she records the number of selfies posted in the past year and the number of people in the foreground of the picture.  What is the sample of this study?

1. The 20 feeds that she analyzed

2.The Instagram feeds of all of Kim's followers

3. All Instagram users

4. All people who take selfies