The author will know that his argument was successful if more _____
schools extend the day with enriching experiences and test scores improve.
schools hire better teachers and use better curriculums.
teachers share ideas and plan their lessons together.
parents demand that students have more time for relaxation outside of school.
The correct answer is: schools extend the day with enriching experiences and test scores improve.
Explanation: This choice directly ties the success of the author’s argument to a measurable outcome (improvement in test scores). If the extended school day leads to better academic performance, it indicates that the argument for enriching experiences is effective. The other options describe positive changes but do not clearly connect to the effectiveness of the author’s argument in a quantifiable way.