— You speak very good French!

— Thanks. I _____ French in Sichuan University for four years. [ ]

A. studied

B. study

C. was studying

D. had studied

对中国古代儒学发展演变表述不准确的是（）

A.孔子创立以“仁”为核心的儒学

B.荀子提出“君舟民水”观点

C.董仲舒吸收佛教和道教思想，神化皇权

D.顾炎武发展儒学义利观，提倡经世致用