Context: He recognizes my voice and knows my normal route , and he was concerned that I not get caught in the building mess -- a mess he was still gathering data on . There were several pauses while he listened to the Alexandria Fire Chief on the scanner . By the time we had extracted what value we could from that conversation , I was getting on the beltway at Telegraph Road .

Question: What 's a possible reason he recognizes the writer 's voice ?
Options:
0. Because he was concerned that the writer not get caught in the building mess .
1. Because he knows the writer 's normal route .
2. Because he has learned to associate the writer 's voice with the writer .
3. None of the above choices .
Answer: 2