OE
“Eschew” means to avoid or abstain, thus the speaker was unable to resist something that lengthened her presentation. The correct answer, “elaboration,” would lengthen a presentation. “Terseness” means brevity and is a reversal trap, and “precision” also is generally not something that would cause a presentation to become excessively long. For the second blank, the clue is “turned a five-minute policy brief into an hour-long,” making “expatiation,” which means to speak or write at length, the correct choice. Since the second blank must match the general meaning of the first blank, “elaboration,” the answer for the first blank provides another clue. “Distension,” the act of swelling, refers only to a physical swelling. Similarly, “repertory,” a collection of information or examples, doesn’t fit the context either.
Answer: C,E