Answer:
c. Instrumentation
Explanation:
In research methods and statistics, mainly there are eight different types of threats associated with the internal validity including experimental mortality, regression, interaction of threats, selection, history, testing, maturation, and instrumentation.
Instrumentation: The term "instrumentation" is described as one of the different types of internal validity threat that encompasses the change in the scores, instruments, or observers that may produce a few changes in the outcomes of a particular study.
In the question above, the given statement represents "instrumentation".
I would say that this was a combination of two features: the fact that Greece is mountainous ( I think this is the major reason) so the cities were located in valleys that were not easily accessible from other valleys, and that there were many islands
These both features made communication more difficult and defense easier.
<span>Hope can do a lot of benefits to the people but getting those hopes up and living vicariously in those illusions make them delusional. At this stage if the reality hits them it's not a present experience. Illusions make you believe false and keeps your hopes up without any chance.
Ex: A person believing that he would get employed soon based on his academics and the reality being the severe condition of recession going on.</span>
