It is much easier to remember something that you had an active part in learning, rather than something that was simply lectured to you. This is why Pokemon players can memorize the type-matchups chart after just a couple hours of battling but people have much more difficulty memorizing the contents of a slideshow. Participating mitigates this somewhat.
Coming up with as many ideas as possible is the correct answer because if you only jot down ideas sure to be useful then you can't explore different opportunities. A is also wrong because if you avoid suggestions you may not be able to progress.
