Which stage is characterized by the chromosomes de-condensing and nuclear envelopes reforming?

The correct answer is associated with the telophase stage of cell division. During telophase, the chromosomes that were previously tightly coiled begin to de-condense, returning to a more relaxed form. This is essential for the chromosome's material to become accessible for transcription and the processes involved in cellular function that occur after division.

Additionally, during this stage, the nuclear envelopes reform around each set of separated chromosomes, creating two distinct nuclei within the cell. This reformation is critical for preparing the new daughter cells’ nuclei to function properly after cell division.

In contrast, the other stages of mitosis involve different processes: prophase is marked by chromatin condensing into visible chromosomes and the nuclear envelope breaking down; metaphase involves chromosomes aligning at the cell's equator; and anaphase is characterized by sister chromatids being pulled apart to opposite poles of the cell. Each of these stages serves a specific purpose, but it is telophase that specifically focuses on de-condensation of chromosomes and the reformation of nuclear envelopes.