Which piece of evidence could persuade a reader to support a claim that middle school students should be required to wear uniforms? (1 point)

In a school district that recently made school uniforms are requirement, attendance rates and grades have improved.
Compared to the cost of regular clothes, the cost of uniforms is often quite less.
School uniforms can be ordered online, which is much easier than going to a store.
When everyone looks the same in their uniforms students begin to lose their uniqueness.

The piece of evidence that could persuade a reader to support the claim that middle school students should be required to wear uniforms is:

"In a school district that recently made school uniforms a requirement, attendance rates and grades have improved."