For the following paragraph, the last sentence has been deleted. From the given options, choose the one that completes the paragraph in the most appropriate way.
Birth rates have fallen dramatically - and voluntarily. Coercive birth control, including paying people not to have babies, was discredited and abandoned decades ago. Nearly two-thirds of the couples in poor countries now use birth control, and not because some patriarchal westerner told them to. In the 1970s, the government of Bangladesh offered people in the Matlals region lowcost contraceptive supplies and advice. Birth rates promptly fell well below those of neighbouring regions. So Bangladesh extended the service nationally and its birth rate plummeted from six children per woman to three.
(A) The 'population bomb' has already gone off.
(B) Given the choice, people want fewer children.
(C) Governments want fewer children since their own life expectancy falls with rising numbers.
(D) Even when birth rates fall, there is a lag which means population keeps growing far decades until birth and death rates even out.