Why did the development of the time zones make train schedules more reliable
a) time zones set the entire country to the same time
b) time zones measured time locally instead of country-wide
c) time zones made sure that each state was in only one zone
d) time zones created a standard of time that all trains follow

This phrase from the declaration of independence and its primary author thomas jefferson can be used to justify which statement? a) jefferson thought this document could be used in his defense were he put on trial for treason. b) jefferson knew that the colonists' actions would have an international impact. c) jefferson believed that a bill of rights was necessary in the new government. d) jefferson was trying to show the king that the colonists were intellectuals.