怎样用英语翻译：“这个回答是肯定的”？

The answer is positive.

The answer is affirmative.
affirmative [英] [əˈfəːmətiv]
肯定的
Her answer was affirmative. 她的回答是肯定的。
表示赞成的
the affirmative side in a debate 辩论中赞成的一方

It's a positive answer.

The answer is right/ok/correct.很地道的翻译，都可以。 sure通常用法I am sure…，这个题中不用。

The answer is yes

The answer is positive