Final answer:
The author of "Keep Our Streets Open" is skeptical about the proposal to ban private cars downtown and believes it will cause more harm than good.
Step-by-step explanation:
The author of "Keep Our Streets Open" views the proposal presented in "Let's Ban Private Cars Downtown" as option B) skeptical. The author believes that the proposal will cause more harm than good. This is evident from the example provided where a pedestrian-only street initially faced objections from local businesses but eventually became a popular part of the downtown area. This suggests that the author sees potential benefits in keeping streets open for pedestrians.