Answer:
C. He changes back into his monkey form.
Step-by-step explanation:
The Monkey King was buried under a pile of rocks by Tze-Yo-Tzuh, who was trying to calm him down since he was throwing a tantrum because even though he was a god, he was still a monkey. He remained trapped for 500 years, until Wong Lai-Tsao comes into the narrative. Tsao needed disciples for a mission and he chooses for his first disciple to be the monkey king. After some convincing, Tsao was able to motivate the monkey king to return to his monkey form in order to free himself from the rocks, as it was the only way to get out.