Chris has a semester exam in Spanish next week. He has a lot of material to study and has created a circuit-learning schedule to use. Use this chart to answer the question that follows:

The 10 day chart has three columns, day of week, time spent studying, and material to study. Monday, week one, 30 minutes spent studying material A. Tuesday, week one, 0 minutes spent studying material A and 20 minutes spent studying material B. Wednesday, week one, 10 minutes spent studying material A, 10 minutes spent studying material B, and 10 minutes spent studying material C. Thursday, week one, 10 minutes spent studying material B, 10 minutes spent studying material C, and 10 minutes spent studying material D. Friday, week one, 5 minutes spent studying material C, 10 minutes spent studying material D, and 15 minutes spent studying material E. Monday, week two, 5 minutes spent studying material D, 10 minutes spent studying material E, and 15 minutes spent studying material F. Tuesday, week two, 5 minutes spent studying material E, 10 minutes spent studying material F, and 15 minutes spent studying material G. Wednesday, week two, 5 minutes spent studying material F, 10 minutes spent studying material G, and 15 minutes spent studying material H. Thursday, week two, 5 minutes spent studying material H and 25 minutes studying materials A, B, C, D, and E. Friday, week two, 40 minutes spent studying materials A, B, C, D, E, F, G, and H.

What can Chris do to improve his circuit-learning schedule?

Review for longer periods of time, at least 10 minutes, at the beginning of each day.
Shorten this circuit-learning schedule as he is studying the material way too much.
Spend more time on the last day, at least an hour, and study each piece of material longer.
Use blocks of 5, 10, and 15 minutes on Wednesday and Thursday of the first week.