I don't know why someone downvoted you, but as mizinamo said, "men" means male in modern English most of the time. It is a great question though because not too long ago you heard "men" use to refer to people in general all the time. In fact, last week I heard a middle-aged woman say "We as men need to..." and it hit me just how outdated that usage has become in a hurry.
"Uni students are people also" was marked incorrect showing I should have used "too" instead of "also" here. I think it is splitting hairs. I read Mizinamo's explanation about also following the verb. However, I think it is a matter of emphasis that can allow the interchange of word placement. At least in English.
Okay this is ridiculous!! First, I put "Students are people too," and it was "wrong," and the comment at the bottom was "Students are people also." So the question comes around a second time for me to answer "right" this time. So I put "Students are people also," and it said it was wrong - and the comment at the bottom was - get this - "Students are people too" as the "right" answer. So, Duo - WHICH ONE IS IT???
No, Menschen means "people" too.
So your answer is correct. However it sounds like it could be saying that students are people as well as something else rather than as well as students. To say the latter you would normally say "students are people too". It is a subtle distinction that some people will argue about but that is my explanation as to why your answer might not be in the list of correct answers. It is common to have ambiguous meanings when using "too" and "also" as it can be unclear what element in the sentence they are referring to.