I cannot convince them ____ the factA. that B. on C. at D. of

I cannot convince them ____ the factA. that B. on C. at D. of
I cannot convince them ____ the fact
A. that B. on C. at D. of

I cannot convince them ____ the factA. that B. on C. at D. of
D
convince ...of.让某人相信.是固定搭配.

of

D

that吧，convince that的意思是坚信

convince of
使...相信

of convince sb of sth 使某人相信某事