He says he was greedy, that he extracted way too much gold, and that he built far more castles than was necessary. That's another crime against him, because William commanded hundreds of castles to be built in the 20 odd years of his reign.
maybe research what you were reading and to make sure you retained the information turn over the sheet and make notes on whatever you remember. then turn over the sheet and see what you missed out. not really sure if this helped