Question

which is the best evidence for a claim supporting mandatory school uniforms?
a recent study concluded school uniforms improve graduation and attendance rates.
school uniforms violate a student’s right to freedom of expression.
school uniforms might possibly diminish social barriers between students.
school uniforms can be a financial burden for some families.

Explanation:

To support mandatory school uniforms, evidence should show positive impacts. The first option cites a recent study concluding uniforms improve graduation and attendance rates, which is empirical and supports the claim. The second and fourth options present negative aspects, and the third uses "might possibly," which is less conclusive than a study.

Answer:

A. A recent study concluded school uniforms improve graduation and attendance rates.