Answer:
B. the spread of Buddhism in Central Asia.
Step-by-step explanation:
The great Mauryan dynasty, was founded by great ruler Chandragupta Maurya. He founded the Mauryan dynasty in the year 322 BC. Magadh was an important place in the Mauryan dynasty and it was a center of power, prosperity, peace, science and knowledge.
The silk route passes through the region connecting Magadh to rest of Asia. The Silk route is a network of the trade routes that connects the East and the West.
Under the Mauryan dynasty, international trade was allowed through the Khyber pass. The silk route was not only important as it traded precious silk, incense, spices and textiles to far off place, the Silk road also helped Buddhism and Jainism to spread to Asia countries and also to the Mediterranean. Under the rule of Ashoka, Buddhist ambassadors were sent out to different places to spread and preached Buddhism.