Based on this map, the largest concentration of industry was in the:
B Northeast
According to the given question, we are asked to show the largest concentration of industry based on the given map and the factors ethat helped to contribute to this.
As a result of this, we can see that from the complete question which contained the map, there is a map which shows the concentration of industries and it was most concentrated in the Northeast as majority of the industries were located there.
Therefore, the correct answer is option B