【加賴叫過去】評論

In stage three, birth rates also began to fall.   (A)   In cities there was less incentive to produce large numbers of children, since city dwellers no longer worked the land, and the cost of raising children in an urban environment was greater than in rural districts.   (B)   Furthermore, more children survived into adulthood due to improved living conditions.   (C)   These economic pressures led to a lower CBR and over time the numbers of people being born started to approximate the numbers dying.   (D)