Context: Today , I was friended on Facebook by someone I went to school with in Tennessee from Kindergarten to Senior year of high school . Of course I remembered the name , I knew this person , at least marginally , for thirteen years . So I added them .

Question: What may have caused you to add them on Facebook ?
Options:
0. I used to know them when I was a kid .
1. None of the above choices .
2. I used to know them when I worked in Tennessee .
3. I knew their kid .
Answer: 0