Answer: C: The citizens of Athens stayed within an overcrowded walled city.
Explanation:
The Peloponnesian War had only been fought for a few years when farmers and other citizens who lived outside the city of Athens flocked to the inside for protection from the Spartans. The city had not prepared properly for this type of overcrowding. There was a shortage of food and clean water as a result. There was a lack of cleanliness. Athens was unable to get rid of all the waste that the mass of people was creating. This caused a plague.
Answer:quantitative Research
Explanation:Quantitative research is defined as a systematic investigation of phenomena by gathering quantifiable data and performing statistical, mathematical, or computational techniques.
There are four main types of quantitative research designs: descriptive, correlational, quasi-experimental and experimental. The differences between the four types primarily relates to the degree the researcher designs for control of the variables in the experiment.
If Tonya is interested in studying psychological disorders and she wants to study the classification system that is most often used in the U.S, then she should read the DSM IV TR. The DSM IV TR, is about classifications of psychological disorders that is most often used in the U.S, and it will fit to Tonya's liking.