Answer: The answer is a need for a larger workforce.
Explanation: As cash crops meant increased economic growth for Louisiana, it also meant that a larger workforce was needed to produce these items.
The answer to the question is d
In the illustrative case of Rome, Italy, in the 1920s and 1930s, suburbs were intentionally created ex novo in order to give lower classes a destination, in consideration of the actual and foreseen massive arrival of poor people from other areas of the country.
so railways
They wewre called the serfs/pesants.