Context: She smiles a little , but she can still feel Sora 's heart writhing in hatred and rage for that woman . " Please do n't worry , Sora ... until we learn what 's happened in the past 6 months , we 'll always wonder , but you ca n't dwell on it ... you ca n't let things like that get to you . She 's not worth your time and energy , Sora , just forget about her ...

Question: Why is someone telling Sora not to dwell on something ?
Options:
0. Because Sora just needs to forget about people .
1. None of the above choices .
2. Because it only does harm to herself and does n't do any good .
3. Because they have n't yet learned what 's happened in the past 6 months .
Answer: 2