Why were political machines difficult to break up? they always operated within the law. they created a cycle of supply and demand. they used violence to intimidate voters. they created a cycle of favors for votes.

The correct answer is D) They created a cycle of favors for voters.

Political machines are difficult to break up because they created a cycle of favors for voters.

Political Machine is a party organization which has a strong leader or a solid group of leaders. They command a good number of votes to maintain control of a location, that could be a state, county or a city. Political Machines provide help and favors to voters in order to maintain their control. They are called “machines” for their system of efficient operation.  

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

he sent troops to protect the students as they entered the school.