I need help with getting the answer

Correctly match the characteristics, people, events, and documents to the following time periods. Place the correct letter in the box provided next to each listed item. Each correct match is worth 1 point.

A. Pre-Colonial 12,000 B.C– A.D. 1607 
B. Colonial Era 1500s–1763 
C. Becoming a Nation 1763–1789 
D. The New Republic 1789–1815 
E. Growing and Changing 1815–1858 
F. The Civil War and Reconstruction 1858–1877 
G. The Modern Era Begins 1877–1900 

Answer: 
1. hoop skirts, blue and gray, Bull Run 
2. Louisiana Purchase, “Star-Spangled Banner,” Farewell Address 
3. long houses, potlatches, Beringia 
4. Andrew Carnegie, Standard Oil, the light bulb 
5. Pilgrims, John Smith, indentured servants 
6. Declaration of Independence, Yorktown, Shays’s Rebellion 
7. transcendentalism, Manifest Destiny, the Alamo 
8. Abraham Lincoln, Gettysburg Address, 13th Amendment 
9. steam engine, canals, Seneca Falls Convention 
10. Williamsburg, John Oglethorpe, Mayflower Compact 
11. President Washington, Alien and Sedition Acts, cotton gin 
12. cattle drives, Ellis Island, Samuel Gompers 
13. Stamp Act, Boston Tea Party, Constitutional Convention 
14. Dred Scott, John Brown, Antietam 
15. Hamilton’s Financial Plan, Marbury v. Madison, Lewis and Clark 
16. Italian immigrants, Battle of Wounded Knee, W.E.B. DuBois 
17. French and Indian War, House of Burgesses, Puritans 
Your Score ___ of 20 
18. Boston Massacre, the Virginia Plan, Bunker Hill 
19. Santa Fe Trail, Mexican War, Irish immigrants 
20. stocks and bonds, Triangle Shirtwaist Fire, alternating current