Context: He 's crouched down , close to the ground , sniffing it cautiously . Then he lifts his nose to the air once more , turns his head either way , and inhales deeply . Then he lets out a small growl and turns to the other three while on all fours .

Question: What may be a fact about this situation ?
Options:
0. A dog is getting aggressive .
1. A dog has discovered something .
2. None of the above choices .
3. A dog is ready to attack .
Answer: 1

Question: What may happen during the incident ?
Options:
0. The dog will hurt others .
1. The dog will get let go .
2. None of the above choices .
3. The dog will remain cautious .
Answer: 3