Context: Last year , when I stopped carrying an umbrella it rained so rarely , my allergies were hardly noticeable . This year , uh . Mold is # 1 with a bullet on the allergy list ( dust is # 2 ) , although there are also some autumn spores that get me .

Question: Why is mold # 1 with a bullet on the allergy list ?
Options:
0. None of the above choices .
1. Because it rained so rarely .
2. Because mold activates the writer 's allergies .
3. Because it was last year .
Answer: 2