Answer:
D. Iron and Steel
C. Coal and Cotton
Step-by-step explanation:
Iron and steel industry was crucial for the development of machinery and infrastructure, which were key components of the Industrial Revolution. The coal industry was also essential as it provided the fuel for steam engines and heating.
The cotton industry, particularly in the United Kingdom, was a significant part of the Industrial Revolution as well, with the invention of machines like the spinning jenny and the power loom greatly increasing the efficiency of cotton production.
So, the most accurate answer would be a combination of options C and D.