In the ruling known as brown 2, the supreme court
a) overturned brown v. board of education
b) ordered the immediate implementation of brown v. board of education
c) implement "the southern manifesto"
d) upheld the segregation of central high school in little rock, arkansas

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: