Which phrase describes what the "push and pull" theory was about?
a) american indians in the west
b) nativism
c) immigrants coming to america
d) political machines in cities

the correct answer is d

a conference committee is a group of congress representatives appointed by the senate and the house to reach an agreement over a bill that had different versions in each chamber. this is due to the fact that, to pass a law. both the house and the senate must agree on the exact same content and wording of the bill to present it to the president.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers