Answer:
B. Increased human capital increases productivity.
Explanation:
<em>Greater educational opportunities don´t really encourage women to have children </em>(A), on the contrary, it is more likely that young women prefer not to have children while they are studying.
<u>External benefits</u> (C), such as the possibility of being better citizens, of improving communication and performance of people in society or of generating new solutions to different human problems, <u>aren´t sufficient to achieve faster economic growth in developing countries.</u>
On the other hand, one of the reasons why developed countries are rich is because their workers are more productive. Productivity does not mean longer hours of work, productivity means producing more with fewer resources and with better-trained workers. Therefore the option "B. Increased human capital increases productivity” is the most consistent with seeking greater educational opportunities for young women, which would lead to faster economic growth in developing countries.