Context: I go for a walk at around 7 pm some nights just to clear my mind and enjoy the stillness till a car comings speed up the road and blinds me with their lights anyway = PI heard about LJ funnily enough through my ex ! She had so many secret little parts to her life i could never get my head around . As someone who is pretty " simple " i could n't understand a lot of her when we first met . But I ' m very accepting and she was very fun for a time .

Question: Why would someone suddenly start reminiscing about someone else ?
Options:
0. They have been asked questions .
1. None of the above choices .
2. Hearing from them can bring up memories .
3. It is someone they are fond of .
Answer: 2