A national border. Long river.
Correct answer choice is :
B) Silk road
Explanation:
Buddhism is the world's fourth biggest religion with over 520 million adherents, or over 7% of the global community, known as Buddhists. An Indian religion, Buddhism includes a diversity of cultures, faiths and religious modes mostly based on primary education connected to the Buddha and ending defined theories. Buddhism began in Ancient India as a Sramana myth sometime between the 6th and 4th centuries BCE, increasing through much of Asia. Two main existing branches of Buddhism are commonly acknowledged by scholars.
C. europe hope you get it right tell me if its right or not