Which of the following conclusions is supported by the chart ?
Average time spent on math homework by student grade level shows minutes per night from 10 to 30 in increments of 5 on the vertical axis and grades 5, 6, 7, 8 on the horizontal axis with a bar for 5 at 15 minutes, a bar for grade 6 between 15 and 20, a bar for grade 7 at 20, a bar for grade 8 at 30.
A.
Students in Grade 6 spend twice as much time on their math homework than students in Grade 8.
B.
Students in Grade 8 spend twice as much time on their math homework than students in Grade 5.
C.
Students in Grade 7 spend half as much time on their math homework than students in Grade 8.
D.
Students in Grade 7 spends half as much time on their math homework than students in Grade 5