After people arrived in North America, what is likely a reason they moved south rather than staying near a bridge

You're doing research for a public essay on alternative medicine. which of the following sources has the most reliable information? a.a post on a social networking site about the undesired side-effects of different alternative medicinesb.a recent government report comparing the results of alternative and contemporary medicine for a specified diseasec.an anonymous article on a medical website that claims the success of alternative medicined.a 2003 study conducted by a medical research center about the effects of alternative medicine

The state fire marshal ensures a program can legally operate in a specific location and has sound structure?

The form the boundary between north and south china. a. himalayan mountains c. change river b. xi river d. qinling shandi mountains