I hope it is helpful for you .....
<h3>Please mark me as Brainliest </h3>
<span>B. The Readers' Guide is a basic index, while the other resources are full databases allowing access to actual articles.
The Reader's Guide only dates back to 1983 and only contains works that are considered popular. the total number of works within the reader's guide numbers only slightly higher than 450.</span>
The most appropriate language is formal language
As someone who writes books, I'd normally use quotation marks, and the person is obviously talking, so the first one should be correct.