Help me get this answer (25 points)

I believe its 4 because yea

The question is only asking for the 4-5 hour students, not anyone else. If you look at the 4-5 section, which is yellow, you will see the bar fills up to 6. This means that there are 6 students spending 4-5 hours a week watching TV.
Your answer is C.)
I hope this helps!