Crime scene investigators arrived at the scene of a brutal murder, and casts were made of every footprint Why could this be a waste of an investigator's time?
A
Almost everyone wears shoes.
B)
The suspect's shoeprint could be present.
The lab is not sure how to analyze shoe print evidence.
D)
Some of the prints were known to belong to the police investigators.

d: their own individual powers within the new goverment

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:

because it’s really sad that’s why it’s in history native americans getting kicked out of their homeland.