<span>Political stability is not a barrier to economic development, so the correct answer is B. If something is stable, it means that it is in a good condition, and if it's in a good condition, it cannot be bad or preventing good things from happening. So B is a good thing, and cannot be a barrier to anything. Debts, diseases, and low levels of social welfare can be barriers, because they are indicators of bad conditions in a country. </span>
Although this is a personal question, we can still provide an example of how you could answer this question.
An example of an unusual family circumstance that affected my achievements in these areas was the divorce of my parents. While the divorce itself was amicable, it still took a toll on me and my ability to concentrate on other matters. Because I was concerned about the future of my family, I could not concentrate at school, and my grades worsened. Moreover, I did not feel like getting involved in extracurricular activities or in my community. It took a long time before I was able to get involved in those activities again.
