Which are factors that led to the decline of Rome? Laws differed from one part of the empire to another and caused great confusion.
Land-hungry tribes had been pressing on the empire's borders and weakening its outposts.
The empire grew too large to be governed effectively.
A series of bad emperors failed to solve the empire's problems.​

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

the answer is a wheel

so, colonists did not want to pay any taxes.  

colonists did not consider themselves british citizens.  

colonists felt no sense of obligation to britain.  

colonists objected to violations of their natural rights. are the answer choices?