In which condition will analysis of population change be most evidence-based?

Correct answer: When births, deaths, migration, time period, boundary and composition are all examined

The correct answer is A. Evidence-based population analysis uses several relevant dimensions instead of relying on one number. Births and deaths show natural change, while in-migration and out-migration show the movement component. The time period tells us whether the change is short-term or long-term, and the boundary tells us which area is being measured. Population composition, such as age or sex structure, helps explain who is affected and how future change may occur. B is incomplete because birth rate alone ignores deaths and migration. C is unjustified unless reliable evidence shows that migration is zero. D is not analysis because it lacks supporting data. A careful student should ask what changed, where, during which period, and through which component. Memory cue: complete analysis combines components, context and composition.