Final answer:
In mitosis, the nuclear membrane dissolves during prometaphase, which is correctly associated with Label C.
Step-by-step explanation:
In cell division, specifically during the process of mitosis, the nuclear membrane dissolves in the stage known as prometaphase. This is the stage that follows prophase and it is crucial for allowing the spindle fibers to access and attach to the chromosomes. The correct label associated with the nuclear membrane dissolving would therefore be Label C. Dissolution of the nuclear membrane is essential for the mitotic spindles to interact with the chromosomes, ensuring that each new cell will receive an accurate and complete set of chromosomes during cell division.