Answer:
They acknowledged the Buddha as their spiritual leader ( D )
Step-by-step explanation:
As the relationship between Japan and China been stronger through diplomatic ties, Japan adopted some of the belief and traditions of the Chinese people and also the religion of the Chinese.
The Japanese came to acknowledge the Buddha as their spiritual leader as a symbol that they have adopted and absorbed Chinese culture into their own culture. some Japanese people also learnt Chinese language but the main symbol of adoption of Chinese culture was acknowledging Buddha.