What are A and B in this scenario? Schools not giving 4th graders recess means they don't have time to study in 10th grade? Parents not reading to their kids me

What are A and B in this scenario? Schools not giving 4th graders recess means they don't have time to study in 10th grade? Parents not reading to their kids means those kids have less time for self directed study? Again, vague disagreement isn't super helpful. I'd love to have my mind changed to match reality if I'm mistaken in some way.