The correct answer is: B. advances in electronics.
The new industrial revolution, also known as the fourth industrial revolution, is a period of rapid technological innovation that is changing the way we live and work. It is being driven by advances in artificial intelligence, robotics, big data, and other technologies.
These advances are making it possible to automate tasks that were previously done by humans, and to create new products and services that were not possible before. The new industrial revolution is having a profound impact on the economy, society, and the environment.
Social unrest, the Vietnam War, and demand for higher wages are not the main causes of the new industrial revolution. However, they may be contributing factors. For example, social unrest can lead to political instability, which can create an environment that is more conducive to technological innovation. The Vietnam War was a major drain on the US economy, which may have led to increased investment in research and development. And demand for higher wages can lead to companies investing in new technologies to automate tasks and reduce costs.
In conclusion, the new industrial revolution is being driven by advances in electronics. Social unrest, the Vietnam War, and demand for higher wages may be contributing factors, but they are not the main causes.