Which sentence supports the idea that tattoos are more common than they used to be? A. More young people than older people get tattoos, B. About 40 million Americans have tattoos today. C. Three times more people have tattoos than they did 70 years ago. D. A study found that one in eight Americans has tattoos. ​

c

Explanation:

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.