Israel Commutes to Work by Bus

Israel commutes to work by bus.Since the trip is so long, he uses the time to catch up in his class reading but then he has difficulty remembering what he reads.This is most likely because:

A) he does not review the material in the next hour and next day.
B) he is distracted by noise on the on the bus.
C) he has not previewed the material.
D) he is not taking notes as he reads.