Which of the following correctly describes eukaryotic cells?

Eukaryotic cells are characterized by their complex structure, which includes a well-defined nucleus that contains the cell's genetic material. This nucleus is surrounded by a nuclear membrane, distinguishing eukaryotic cells from prokaryotic cells, which have a simpler structure and lack a true nucleus. Eukaryotes also exhibit a variety of organelles, such as mitochondria, endoplasmic reticulum, and Golgi apparatus, that perform specific functions within the cell, contributing to its overall complexity and efficiency in carrying out life processes. In contrast to options discussing simplicity or confinement to bacteria, the defining features of eukaryotic cells showcase their intricate organization and diverse cellular mechanisms. Additionally, not all eukaryotic cells possess a cell wall, as seen in animal cells, which further supports the correctness of defining them as complex structures with a nucleus.