What is the author’s main purpose in writing this passage?

the standardized testing of students refers to giving all students the same test or kind of test. this kind of testing is beneficial not just to students but also to their teachers. the student’s scores show the effectiveness of the teacher. if the student does not show good results, the teacher can see where the student needs more . in this way, the student’s scores can be used by teachers to pinpoint the student’s weak areas. standardized testing ensures that no student is ever neglected. standardized testing also allows teachers and educators to see how the student compares with other students in other schools and states. this is a way for school officials to see if the problem is with the student or with the school itself. best of all, standardized tests are graded fairly. students will no longer suffer because of classroom favoritism.

a.
to inform the reader that students benefit from all kinds of testing
b.
to persuade the reader about the advantages of standardized tests
c.
to express the author’s opinion on the harmful effects of standardized tests
d.
to inform the reader that student scores on standardized tests have decreased