Which statement is an example of the author's use of logos in "the dam nation of a canyon" ?
a. the author gives the reader facts about the areas animal and plant life both before and after the dam was built
b. the author makes fun of his opponents and sarcastically calls them names in order to downplay their arguments.
c. the author uses unpleasant and ugly words to describe the state of the land after the construction of the dam.
d. the author honestly admits that he is biased because he loves nature and wants to see the land restored.