Hello, sorry this is a little late, but hopefully it can help others who visit this question!
I believe the correct answers to your question would be:
Valid Reasons: "Barring motor vehicles from the central area will help reduce air pollution and noise pollution." and "Studies predict that shopping activity in the area will increase if cars are prohibited."
Invalid Reasons: "At a dinner I attended recently, someone complained loudly about the number of cars in the shopping district." and "Many cities of our size have downtowns that are only active during workdays, not on evenings or weekends."
I can confirm these answers are 100% correct!
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For example Mrs. Bennett claims Mr.bennet has no regard for her Nerves when in reality he claims that he is well aware of her Nerves meaning that he agrees she is crazy
B. You, because the word you is the first word of the question and the fist letter of the first word at the beginning of a new sentence is capitalized.
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