Mahavira Preached for Some Thirty Years Until, at the Age

Mahavira preached for some thirty years until, at the age of seventy-two, he

A) died in the town of Pava, located in the northern Indian state of Bihar.
B) left the Jain community and disappeared into the Himalayas.
C) returned to his hometown to retire from the religious life.
D) finally was acknowledged by followers to be a tirthankara.