Answer asaap

what effect did factories have on the cities in which they were located? a) living conditions improved. b) food supplies increased. c) population increased. d) population decreased.

I would say; D.

Explanation:

If a factory that let out horrible smells, caused pollution and health conditions, and killed animals nearby, were brought in people's towns, either people would move elsewhere, or they would get ill, and possibly, pass away.

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 make world peace not vileonce with fist but words