Two historians are most likely to reach different interpretations about a historical event because: a. their theses about the event are smilar b. they refuse to share sources with one another c. their personal biases toward the event differ d. one of them fails to recognize the correct interpretation.

C.their personal biases toward the event differ

There is a modern view of history that recognizes actually that there is no single history but "stories" to be told. Each begins from a specific thesis or context close and then departs in the development of construction or perception of major historical events. A great example is WWII, where there are complex interrelations of causes, and therefore the small countries who lost the conflict will have their own ways of explaining the conflict (Japan, Germany especially). While others such as Britain, the US, France while sharing a common approach to the issue. Still, for Russia (that time the URSS) while have a particular notion of "being invaded" and the name given to the conflict is then called "the Great Patriotic War". This happens to China, with Manchuria being attacked by Japan. Further interpretations could be found in Balkans and other regions.

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.