Let's take on an author's purpose question from the Official Guide to the GMAT. You can find the passage and the question in the 13th Ed. Also, if you'd like a recap of the passage and what it's all about, you can watch this video.
https://magoosh.com/gmat/2015/gmat-tues ... ension-60/
https://magoosh.com/gmat/2015/gmat-tues ... ension-60/












