The correct option is D Industrial policies
The policy factors that helped the industrialisation process in Tamil Nadu are education, infrastructure, and industrial promotion. In addition, the state boasts excellent electricity and transport infrastructure.
The state has one of the highest numbers of engineering colleges and industrial training centres in the country. Also, public and private transportation has helped in accessing the rural and urban cities. The government has also made several policies to promote specific sectors like automobile, auto components, biotechnology, and information and communication technology.