Which of the following materials does sound travels faster in? A. Pure water b. salted water c. unpolluted air d. polluted air

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.

c.           is the correct answer

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;

i'm thinking 600 feet deep in one of the finger lakes.