Adrian Miller is accused of sneaking into the school to try to change his grades.

I think that the answer is a because she wouldn't have been able to see adrian sneaking into school between 3:00p.m.-7:00p.m. because he left wrok for about an hour and thirty minutes 1:10-2:40 and then returned to his job and stayed there.

Hope this helps.

If i am wrong I am sorry

Have a nice day/night

the whisper is the answer, hope this : )