What happen to rome under their rule

The fall of the Roma is often associated with the epoch of the Great Migration of peoples. Let's figure out how it happened.

With the growth of the land controlled by Rome increased and it's crushing on the provinces. After the land reforms of the Grukhov brothers in Rome began to develop a subsistence economy, which resulted in a reduction in the share of the processing industry, increased prices for transportation of goods. Trade began to experience the extreme degree of decline, which resulted in the cessation of relations between some provinces.  

The increase in taxes reflected on the solvency of the population. Small landowners began to ask for protection from the large owners.

The decline of the economy caused a wave of indignation in the country. In the empire, there was a demographic crisis-increased mortality rate and decreased fertility. To improve the situation in the country allowed the policy of allowing the Barbarians to settle on the border territories of the Empire, provided that they will take an oath to protect the new homeland.  

With the replenishment of the population of the Empire barbarians are growing and their number in the military service.  

Among the indigenous Romans, social apathy was increasingly observed. In society, the destruction of spirituality and patriotism.

And, of course, the decomposed society and the weakened army could no longer compete with the barbarians coming on the borders of the Empire. A more effective method of government was needed to confront the external threat.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.