Answer :
The correct answer is letter C. labor shortages due to a declining population. High total fertility rate refers to the average number of children a woman possibly have. The higher the fertility rate, then overcrowding will be expected. There will problems maintaining the food supply and difficulty providing health care for a young population. The issue on (C) labor shortages due to a declining population is not merely an issue.
The thing which probably isn't particularly well connected to a high total fertility rate would be labor shortages due to a declining population - c. Considering a high fertility rate would also imply a lot of people who would be able to work on different projects and in industrial applications, it isn't very probable that there would be labor shortages.