Your answer is a, and c. i hope this has helped, as i have had the same question earlier plus i have the same text book to, so i hope this has helped.
C. Savannah was the city that had the lowest population density in 1970, because it became a town only then, whereas Boston and New York City were already large places.
I think it’s D :) correct me If wrong hope you get it right GOOD LUCK!!!
Answer: True
According to a legend, Silk was first invented by Leizu, the wife of the Yellow Emperor, around the year 2696 BC.
I hope this helps.