Describe this development “nationalism”

Nationalism is an ideology and movement that promotes the interests of a particular nation (as in a group of people) especially with the aim of gaining and maintaining the nation's sovereignty (self-governance) over its homeland. ... It also encourages pride in national achievements, and is closely linked to patriotism.

Explanation:

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“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.

answer; ///i do believe that the correct answer is (b) ///middle colony