Read the map.

A map titled Spread of Hinduism. A key shows Expansion routes with a red arrow. The Himalaya Mountains are along the border between India and China. Beginning near the eastern coast of India, arrows point southeast to Sri Lanka, Sumatra, Java, Indonesia, Malaysia, Philippines, Thailand, Cambodia, and Myanmar (Burma).

What does the map show about the spread of Hinduism?

Hinduism spread to areas of western India along trading routes.
Hinduism did not expand beyond the natural borders of India.
Hinduism spread primarily to areas east and south of India.
Hinduism was hindered by natural barriers from spreading to other regions.