Please answer with explanation

Suppose parents treat children as consumption goods. Empirically speaking, we know that with economic development, fertility rate falls. Economists can explain fertility decline by arguing that: Select one: Q a. Wages rise per hour, so the opportunity cost of mother's time to raise children rises. O b. A general rise in income may result in a higher demand for children, but generally this effect is weak compared to the opportunity cost effect in (a) above. 0 c. A general rise in income may result in a lower demand for children because the cost of raising children also rises as the children must have higher human caphaL Q d. Answers (a) and (c) are correct. 0 e. Answers (a), (b) and (c) are correct