Your questions answer is D
Answer:
Neighboring countries would soon follow
Explanation:
Domino theory basically says that if one country goes down then the country next to it or near it will too, just like a domino.
Gladwell believes students in a KIPP school succeed despite facing circumstances that would otherwise lead to failure.
Rather than failure, however, these students succeed. Gladwell argues that the culture of the school and its community -- he uses the term "cultural legacy" is what leads to success.
Gladwell argues cultural legacies are so powerful they help people defy the odds and succeed. He believes more needs to be learned about them.