The correct answer is C) The South became too dependent on one crop, limiting development.
The thing that happened as agriculture became entrenched in the South was that the South became too dependent on one crop, limiting development.
The economy in the southern states based so much on agriculture. And for agriculture to be successful, plantation owners used slaves, so slavery was an important component of the success of agriculture in the Confederate states. These plantations depended basically on cotton that was exported. The cotton industry increased the demand for workers that earned a low wage. So the southern states depended so much on agriculture when, at the same time in the northern states, the industry was developing and factories were being built.
