Context: The only reason Grasper survived was because he had never allowed his feelings for Ryuichi and Noriko to cross into love . NG survived because it was a business , and if it fell he would just build another . It was purely monetary in nature , no such feeling as love involved . He lay still and was almost asleep when he heard the door to his office squeak open . He looked over , not having the energy or desire to get up .

Question: What may be the reason for Grapser surviving ?
Options:
0. None of the above choices .
1. He allowed his feelings with Noriko to cross into love .
2. He was careful with his business relationships .
3. He was careful with his relationships .
Answer: 3