Read the paragraph. Students attending schools with mandatory uniform policies experience less pressure than do students who must choose their wardrobes. This is because school uniforms allow students and their parents to save money and time. The financial investment in uniforms at the beginning of the school year is far more economical than the purchase of an entire wardrobe of designer clothes and trendy styles. Students who do not have to deliberate what to wear each morning are able to invest their time in more productive ways, such as studying for tests or finishing homework. Uniforms may stifle students’ self-expression, but there are many other ways to reveal one’s individuality at school. Which sentence addresses a counterclaim?

I believe one of these is a counterclaim:
Students who do not have to deliberate what to wear each morning are able to invest their time in more productive ways, such as studying for tests or finishing homework.
Uniforms may stifle students’ self-expression, but there are many other ways to reveal one’s individuality at school.

In my opinion, what true student will do homework or study willingly?
Yeah sure, there might be other ways to show your personality but there are people who can only express who they are through clothes or hobies because they aren't good with words.