中国饮茶的风尚，到了第七世纪的唐代，已经相当盛行了。____

A. In the 7th century of the Tang Dynasty, the Chinese prevailing custom of drinking tea was in vogue

B. y the Tang dynasty in the seventh century, tea-drinking had become very popular in China

C. uring the Tang dynasty in the 7th century, the custom of drinking tea was prevailed

D. The custom of Chinese drinking tea was very popular in the 7th century of Tang dynasty