Answer :
Your answer would be C. labor shortages due to a declining population. I hope it helps :)
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. so there for it is C