The events that best explain the spread of Buddhism during Asoka’s reign are:
Asoka took over Kalinga by force. Asoka rose to power through civil war. Asoka adopted Buddhism. Asoka became a just and compassionate ruler.
This sequence highlights how the violent conquest of Kalinga deeply affected Asoka and motivated him to embrace Buddhism, which preached non-violence and compassion, leading to the spread of these ideals throughout his empire.