PLEASE HELP ILL GIVE BRAINLIEST

YOU DONT HAVE TO ANSWER ALL THE QUESTIONS MAINLY JUST 15

15. its called the National Road.

16. It begins in Vandalia, Illinois and ends in Cumberland, Maryland, and vice-versa.

17. roughly 620 miles

18. in the year 1811

19. in the year 1828

20. no idea, but you can figure that out

Explanation:

hope that helped.

b, public works good luck

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.