During the Progressive era:. a) most eastern European immigrant women worked as telephone operators. b) the number of married women working declined. c) growing numbers of native-born white women worked in offices. d) growing numbers of native-born white women worked as domestics.

I think its d :) If its not plz let me now and ill delete my answer

Explanation:

Most likely C since women in the 1920s worked instead of staying at home.

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:

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.