Which is the best example of a claim made in an argumentative essay?

Our principal, Ms. Garcia, agrees that updated audiovisual equipment will improve the quality of the school.
All classrooms in Mountain View Middle School have been supplied with new audiovisual equipment—and our school needs it, too.
Studies show that classrooms with appropriate audiovisual equipment contribute to student learning.
The best way to improve Washington Middle School is to provide updated audiovisual equipment for each classroom.

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