Which essential urban need was met by this structure, made possible by roman engineering?
reliable communications
clean water
efficient transportation
sufficient food

d the wampanoag the pilgrims because the pilgrims protected them from their native americans foes.

d) he bring down boss tweed and tammany hall.

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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: