Concept:Industrial concentration in Eastern USA is driven by favourable economic and physical conditions, not by financial weakness.
Explanation:The eastern United States attracts industries because it offers a large market from its dense population.
It is rich in natural resources such as coal and iron ore, which support manufacturing.
The region also benefits from high technology and advanced transport infrastructure.
These factors work together to encourage the clustering of industries in that area.
Inadequate capital means a lack of funds needed to set up factories.
This would discourage industrial growth rather than promote it.
Since Eastern USA is financially strong, inadequate capital is not a reason for its industrial concentration.
Answer:C. Inadequate capital