I would tell u the good things about the product how to use it and where to buy it how much it cost and why it's the best product
The source is credible if they're reliable
The best answer would be C) Reference section because if I were to walk in a library (which I have) I don't see encyclopedias in the fiction section cuz encyclopedias are REAL not fake, and an encyclopedia is NOT a biography book, and its not fiction either so its in the reference section.