please give me the right answer

Chelsea is writing an argumentative essay on how homework is not directly linked to student academic success. Which of the following is not effective evidence for her body paragraph?


A. According to Barbara Smith, the superintendent of Anytown School District, "Eliminating homework in our district has resulted in an overall improvement in student happiness and an increase in time spent with family and friends."

B. Based on a survey completed by over 700 families in the Anytown School District, 96% of students and adults were in favor of eliminating homework to provide more time for students to pursue their own interests.

C.In addition, many teachers in Anytown School District have expressed their agreement with the district's decision to eliminate homework because it cuts down on excessive grading.

D.Students need more time to spend with family and friends. One time I spent four hours on homework after spending eight hours at school.