What was an early way that Hinduism spread? It spread by boat into Indonesia.
It spread overland into Russia.
It spread by boat into Africa.
It spread overland into the Middle East.

It spread by boat into Indonesia.

Explanation:

About the beginning of the Common Era, Indian merchants may have settled there, bringing Brahmans and Buddhist monks with them. These religious men were patronized by rulers who converted to Hinduism or Buddhism

the correct answer is "c": the pillars proclaimed his regret at the bloodshed at the battle of kalinga and his conversion to buddhism.

the kalinga war is considered as one of the largest battles in the history of india. it was fought between the between the maurya empire, which ruled the lands of what is now known as india at the time, and the independent feudal kingdom of kalinga.

the army of maurya empire, led by its king ashoka, fought a prolonged war against kalinga. the war ended around 262 bce with the victory of the maurya empire. it is believed that ashoka, after having witnessed the loss of many lives during this war, felt deep responsibility and eventually converted into buddhism.