C, it's mainly how their genetical system works given from their Biological parents.
Answer: Ethnographic research
Explanation:
The ethnographic research is one of the type of quantitative technique that helps in understanding the research interacting process with the real environment.
The main purpose of this type of research is that it helps in interpreting the given data for evaluating its implications and also illustrating the social culture on the basis of the observations.
According to the given question, the ethnographic research is one of the special observational method that discovered the behavior and reaction of the customers.
Therefore, Ethnographic research is the correct answer.
Mercantilism is the economic system established between a colony and a colonial power, where the natural resources found in the colony are used in the mother country to produce complex goods. An example of this would be how a colony would be advised not to create oil refineries to refine the oil into gasoline. This would mean that gasoline, the product of refined oil, would be imported to the colony once refined elsewhere. Thus, they would depend on foreign economic activity to meet local needs.
War tactics, better leadership, larger armies that were stronger strained, advanced weaponry
As a result of the crusades the use of money increased
