The answer is D. The didn’t keep their costal stronghold.
The correct answer is D. Creation of the civil service exam
Explanation
The civil service examination system in Imperial China was a testing system designed to select the most suitable candidates to be appointed as Chinese government officials. This system was influenced by the teachings of Confucius, a Chinese philosopher who wrote deeply on governance and meritocracy. This meritocracy system is the longest-lasting in the world, so it can be said that confusion has impacted the Chinese government and society because they were created based on his studies. So, the correct answer is D. Creation of the civil service exam.
