Pls hurry This diagram shows some of the steps in becoming a -
naturalized U. S. citizen
member of the US armed forces
registered voter in the U. S.
candidate for elected office in the US

Becoming a naturalized U.S. citizen

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

collect the tariff by force if necessary

use the military to enforce a federal law

b and c