It was spread by Muslim traders.
Islam, of course...
South east Asia first brought Islam to Indonesia
Indonesia is about 87.2% Islam as of 2010
Sunni
ISLAM
Christianity and Islam are both in Indonesia.
Well the majority of population are muslims so Islam.
From 711 to 1492.
Islam became part of Indonesia from as early as the 8th century through Arab traders. Close to 90% of the population in Indonesia are Muslims.
Indonesia is the most populous Muslim country
Indonesia
That would be Islam.