As a population moves through the demographic transition, do changes to fertility or changes to mortality have a larger impact on age structure? Group of answer choices Fertility MortalityGiven changes to the age structure in the beginning of Stage 2 of the Demographic Transition, as a result of uneven declines in mortality across age groups, which institutions have to respond most rapidly and immediately? Group of answer choices Unemployment insurance Schools The labor market Social security (old-age financial support)