Final answer:
The summarizing statement indicating that sugar cane became a major cash crop in Louisiana in the 1800s following the introduction of ribbon cane correctly reflects the important transition in agricultural practices and economic focus of the region described in the text.
Step-by-step explanation:
The text provided discusses the history of sugar cultivation in Louisiana, emphasizing the significant change in sugar cane farming with the introduction of new varieties more suited to the region's climate.
Though sugar had been planted in colonial Louisiana since the 1750s, it did not become a major crop until the introduction of ribbon cane in 1817. This variety, along with the one brought by refugees from Saint-Domingue in 1797, was crucial for the development of sugar cane as a cash crop in the 19th century.
The text underlines that while the Creole cane first cultivated by colonists did not thrive well, it was these subsequent introductions that led to the successful expansion of sugar cultivation in the region.