According to the sentence, Aśoka spread Buddhism to foreign lands through option D: by merchants.
What is the term Buddhism about?
Buddhism is considered as a largest religion and it was established more than 2500 years ago.
Asoka send his son to Ceylon in order to spread the Buddhism in the world. He is known as the best ruler and kept the largest army for any war. He respect all the religion and living things also.
Therefore, correct option is D.
Learn more about foreign lands, refer to the link:
https://brainly.com/question/270937
