What was the importance of the 15th Amendment to the civil rights movement? It guaranteed voting rights to all Americans.
It protected all Americans from discrimination.
It promised to uphold civil rights for all Americans.
It granted citizenship to African Americans.

The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.

Explanation:

c, to compete

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: