The best reason for Derek to include in his argumentative essay to support his claim that paper books are easier to read than electronic books is:
Paper books are more affordable than electronic books.
While this reason provides a point of comparison, it can help support an argument about accessibility and the ease of reading, as affordability can influence the number of books a person can own and read. However, it's important to note that while discussing ease of reading, factors like eye strain, the tactile experience of reading, and distraction levels between digital and paper formats may be more directly relevant. Since none of the options directly address ease of reading, the interpretation of "affordability" may provide an indirect argument for preferences toward paper books.