In which country did the original stupa evolve into a pavilion-like watchtower? A. China B. India C. Japan

The original stupa evolved into a pavilion-like watchtower in China.

The stupa is a mound-like structure that originated in ancient India, primarily as a commemorative monument for sacred relics. As the concept of the stupa spread to China, it underwent significant transformation. Chinese architectural styles and cultural influences melded with the stupa's original design, evolving it into a more elaborate form resembling a pavilion or a pagoda. These structures served not only religious purposes but also as landmarks and symbols of architectural advancement in Chinese civilization.

Thus, the correct answer to the question is A. China.