The state that was most critical for the movement of Buddhism into Central Asia (and, consequently, East Asia) was the

The state that was most critical for the movement of Buddhism into Central Asia (and, consequently, East Asia) was the Mauryan Empire.

Explanation:

The last grand emperor of the dynasty, Asoka (reigned 265-238 BCE), converted into Buddhism. Afterwards, he promoted the spread of Buddhist teachings and influence, building stupas, monasteries and pillars throughout the empire. In his newly conquered lands, he promoted Buddhism. Thanks to his patronage, Buddhism turned into a major religion in India and beyond its borders.

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explanation:

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