Within a group, your role is defined as select the best answer from the choices provided

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:

where is the passage

i cant solve it without knowing the passage

this is a good question! i'll do some research and come back when i have the answer!

it would be a. that is the only one i could think of