By providing the laboring classes with better tenements, improved ventilation, and healthy and cleanly arrangements in respect to yards, sinks and sewerage, they will certainly suffer less from sickness and premature mortality, and a vast amount of pauperism, crime, and wretchedness be prevented.

–dr. john griscom, 1842

what is the main idea of the passage?

crime is the result of poor living and working conditions.

providing people with clean, safe housing will improve society.

people will be more inclined to move to the city if it was clean.

providing people with better factory conditions will improve society.

answer b. providing people with clean, safe housing will improve society.

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:

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation:

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.