A. iron and steel industries B. food and drink industries C. raw materials processing industries D. building and construction industries
Correct Answer: A
Explanation
The answer is A The Ruhr valley in the late 180's is known for its iron production. it is the place in Germany where ammunitions were produced during the world war around 1820, hundreds of mills were produced in many workshops then, knives,tools and weapons were manufactured. iron ore was actually discovered in the Ruhr valley
