Final answer:
Technology's rapid advancement necessitates ongoing retraining and skills development in order to remain competitive in the job market, especially since it benefits high-skilled workers and increases competition for lower-skilled workers.
Step-by-step explanation:
The key point from the text that best supports the idea that a change of skills and retraining of current skills is most necessary for today's job market is c) Technology is rapidly advancing. The text indicates that new information and communications technologies have had a significant impact on productivity, benefiting high-skilled workers the most. This tech-driven productivity has fostered globalization and increased international trade, thereby enhancing opportunities for high-skilled labor but also increasing competition for lower-skilled workers. As a result, ongoing education and retraining are crucial for keeping up with technological advancements and remaining competitive in the job market.