Final answer:
The answer that best fills the blank space is 'Student test scores should increase'. This option suggests that the reason for the issue mentioned is the need for student test scores to improve.
Step-by-step explanation:
The answer that best fills the blank space is d O Student test scores should increase.
This option suggests that the reason for the issue mentioned is the need for student test scores to improve. It implies that if student test scores increase, the problem of not taking sufficient notes may be resolved. This solution focuses on enhancing student performance rather than addressing the concerns of parents or changing the role of parents in encouraging studying.