Final answer:
The most engaging sentence in the passage is, “So instead of April showers bringing flowers, any rain would bring on the pain,” due to its creative wordplay and memorable alteration of a familiar saying.
Step-by-step explanation:
The sentence from the passage that makes the best use of engaging word choice is “So instead of April showers bringing flowers, any rain would bring on the pain.” This sentence creatively plays on the familiar phrase, April showers bring May flowers, to emphasize the negative impact of rain on driverless cars. It uses a rhyme (flowers and pain) and alters a known positive saying to convey a drawback in a memorable way. This choice of words adds a layer of interest and establishes a more engaging tone than the more straightforward sentences in the passage.