This map shows the shifting center of American population in the first two centuries of its existence. What might BEST account for this shifting trend?
A) The increased hurricane activity has created a westward migration.
B) The geographic land forms that once limited movement are no longer there.
C) The increased earthquake activity in the west created an eastward migration.
D) Advances in transportation and technology have made geography less of a limit to population distribution.

big fat oof x

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:

to keep us neatruel and not get involved in any wars

he assumed control of treaty negotiations with a hostile power

spanish executed counts egmont and horne in brussels.