The correct answer is:
c. increased costs of production
Studies have shown that industries could be affected by legislation on global warming through an increase in the costs of production. This can happen because companies may need to invest in new equipment or technology to reduce their carbon footprint or comply with environmental regulations. These additional expenses can lead to higher production costs, which may ultimately be passed on to consumers in the form of higher prices for goods and services. This impact on production costs can influence the competitiveness of industries and their ability to adapt to new environmental standards.