It is difficult for these countries to fund programs for senior citizens because it is predominantly the younger and middle aged individuals who are working and contributing to the economy, while most senior citizens have retired. If there are less young people being born, and there is a significant number of senior citizens because people are living longer lives, it becomes hard for a country to fund programs to care for the elderly.
The answer is B. Hope that helped!
B because it is not in first person and is informing the reader.