Charlotte denied talking about her exams because she had got bad results.
In this context, "denied" is the most appropriate word. When someone denies something, they refuse to admit it or declare it to be untrue. Charlotte likely denied discussing her exams because she was embarrassed by her bad results and didn't want to talk about it.
Charlotte denied talking about her exams because she had got bad results.
In this context, "denied" is the most appropriate word. When someone denies something, they refuse to admit it or declare it to be untrue. Charlotte likely denied discussing her exams because she was embarrassed by her bad results and didn't want to talk about it.