How did Buddhism begin to spread outside of India during the Mauryan Empire?

Responses

Asoka made Buddhism the official religion in lands that he conquered

Asoka made Buddhism the official religion in lands that he conquered,

Asoka sent missionaries abroad to spread Buddhism
Asoka sent missionaries abroad to spread Buddhism

sacred Buddhist texts were copied and sent to foreign lands
sacred Buddhist texts were copied and sent to foreign lands

visitors to India from Persia brought Buddhism back with them

visitors to India from Persia brought Buddhism back with them