Why did the growth of industry create a need for faster methods
of communication?

Explanation:

The telegraph significantly influenced the enhancement of larger and more efficient economic markets. ... As such, these speeds impeded the exchange of data that was necessary for the growth of economic markets. The telegraph considerably reduced the time taken to communicate information across distances.

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i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.