My sister and I are at work with our mom , and she 's painting some school a few towns away . My sister have been working on our summer reading since like six o'clock in this tiny classroom with a computer , which I hacked into , by the way , hehehehe . But yeah , we went to tell her something , and she said " Does n't it smell like fall outside ? "

Question: What is the possible reason for it smelling like fall outside ?
Answer: Because we went to tell her something .None of the above choices .Because it is the beginning of fall .Because the writer and their sister are at work with our mom .