What discovery does Pi make that changes the ranking of the animals on the lifeboat?
a. Pi discovers a hidden supply of food that allows him to sustain the carnivorous animals, decreasing their threat.
b. Pi realizes that the hyena is actually more docile than previously thought, shifting its ranking among the other animals.
c. Pi finds a way to train the wild animals, making them less dangerous and changing their hierarchy.
d. Pi observes the behavior of the animals and reevaluates their ranking based on their individual strengths and weaknesses.