The correct reason why mitosis is a longer process in eukaryotes compared to prokaryotes is:
Checkpoints are designed to detect if there is any damage to DNA.
Eukaryotic cells have complex regulatory mechanisms, including checkpoints in the cell cycle that ensure the integrity of the DNA before proceeding with mitosis, which adds to the duration of the process. Prokaryotic cells, on the other hand, generally have simpler cell division processes (such as binary fission) and lack these complex regulatory mechanisms.