If Ichabod has been recorded to have read several books, then for sure it has increased his knowledge bank, making him more learned in different things so he is a man of great erudition.
Books contain a whole lot of information in them that an avid reader will read and become more knowledge.
Bulleted and numbered lists help readers to comprehend the document easily and break the document into some parts that will guide the reader. But most importantly the method is so handy in technical documents where you understand how do the work step by step. The correct answer is A.