Context: Thursday morning when I went to put my walking shoes on by the front door , I noticed several ants crawling around on the floor . Where did those come from ? I never had ants in here before . Since then I have been finding ants on the living room floor , and now in the kitchen .

Question: What 's a possible reason there were ants crawling around on the floor ?
Options:
0. None of the above choices .
1. Because there was some food spilled or left out .
2. Because the writer never had ants in there before .
3. Because it was Thursday morning .
Answer: 1