In which situation will the total population remain almost stable?

Correct answer: Births plus in-migration are equal to deaths plus out-migration

The direct answer is B. Total population remains almost stable when the processes that add people balance the processes that remove people. The adding side is births plus in-migration. The reducing side is deaths plus out-migration. If these two totals are equal, the net population change is zero or very close to zero, so the total population does not show a significant increase or decrease. Option A would produce population growth because more people are added than removed. Option B gives the balance condition and is therefore correct. Option C does not guarantee stability: if deaths and out-migration are zero while births or in-migration occur, the population will increase. Option D also causes growth because many people enter and relatively few are removed. Memory cue: stable population means “additions = reductions,” not that every individual component must be zero.