Which statement best expresses the central claim of this article? A. In order to survive, the ancient Maya had to adapt to the landscape.
B. Most modern farming practices can be traced back to the ancient Maya.
C. The ancient Maya would have survived longer had they adapted their farming practices.
D. The ancient Maya technique of cross-pollination created a variety of new fruits and plants.

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:

i do not believe this was true indefiantly the native americans would have lsot aganist america one they didndt have the resources and allies that america had and 2   indians werent as advanced at the time as they were not 3 americans had the expreince because some of the soliders from other wars fought in that war and were attecked etc