Answer:
C. shortage of skilled labor.
Step-by-step explanation:
The invention of high-tech (computers, biotechnology, robots, drones, self driving vehicles and so an) is reducing the involvement of skill human labor which will continue incoming years. For example humans carryout the task of carrying-out calculation several years ago, but in recent years computers carry out such works and at a faster pace. Also routine human works such as arranging, bottling, pasting of labels can be carried-out by well programmed out and trained robots. These and many more will cause the shortage of labor(human) in coming years.