Answer:
C. Mindful
Explanation:
Option A - Carless means means your not giving thought or attention to actions which is basically the antonym of Vigilant.
Option B - Inattentive just means your not paying attention to something. but obviously if your keeping your neighborhood beautiful you want to pay attention to it
Option C- Mindful means to keep an open mind to the things around you. Basically being careful which could be used as a synonym to Vigilant which makes it the right answer
Option D - Negligent means to fail taking care of something a total opposite to being careful or mindful
which is why Mindful makes the most sense since the text says your trying to preseve the beauty of the neighborhood. Thank you for coming to my ted talk :D
