Final answer:
Cotton picking at L'Abri in "Desiree's Baby" likely began in August, not in the provided options of January, February, March, or April. The question does not contain the correct choice for the actual cotton picking season. Additionally, all listed crops were grown by enslaved laborers in the Americas, with cotton being significant especially after the cotton gin's invention.
Step-by-step explanation:
In "Desiree's Baby," the month when they picked cotton at L'Abri would be after the cotton plants had flowered and bolls had formed. Given the information provided about cotton cultivation practices, cotton picking typically commenced in August and continued through the fall and early winter. Consequently, the answer to the question is not directly provided in the list of options (a) January, (b) February, (c) March, (d) April, as cotton picking season would start later than these months. Picking cotton was a laborious process involving the entire enslaved community working from sunrise to sunset.
As for the related question about the primary crop enslaved laborers in the Americas were used to grow, Option a. sugar, c. tobacco, and d. rice were prominent crops. However, cotton was also a significant crop, especially after the invention of the cotton gin which made its processing more efficient. The correct option isn't provided for this question either, as these were all critical agricultural products cultivated by enslaved laborers in different regions and periods.