How is this levee system better than the previous system?

Put the following events in the correct chronological order: i. new state constitutions are formed. ii. declaration of independence is signed. iii. second continental congress writes the articles of confederation. iv. special conventions are convened to produce fundamental laws for the states. a. ii, iii, iv, i b. ii, iv, i, iii c. ii, i, iv, iii d. ii, i, iii, iv

According to the map, most mining occurs in the a.northern b.southern c.eastern d.western

Which of these effects of mass production techniques used during 1920