The correct answer is C) push-pull.
Due to years of war, educational opportunities were limited in Afghanistan. The Masrours moved to India so their children would receive a better education. The concept that is described by the paragraph above is "push-pull.
We are talking about the reasons why people decide to emigrate to another country. Push factors mean that there were reasons in their former countries that forced people to leave. It could be religious or political persecution, civil war, poverty or starvation. Pull factors mean that the country of destination has some attractive reasons to emigrate there such as industries, job opportunities, better education or better living conditions.
