Which of the Following Is NOT an Explanation for Lower

Which of the following is NOT an explanation for lower fertility rates in urban areas (as opposed to rural areas) ?

A) Improved access to health care means children are more likely to survive into adulthood.
B) There is less economic incentive in cities to have children because urban children are more likely to go to school (and thus represent a cost to the family) .
C) Women have more employment option in cities, which makes childbearing less central to their lives.
D) The pollution levels found in city water and air decrease both male and female fertility.