The answer is A
Cells are the simplest unit and systems are made up of organs that are made from tissues that are made from cells.
The eukaryotes are the organisms that contain the genetic material (DNA) inside the membrane enclosed nucleus. These organisms contain membrane bound cell organelles, such as mitochondria, Golgi apparatus etc. as opposed to the prokaryotic organisms that contain no membrane bound organelles and no nucleus. The presence of enclosed nucleus and membrane bound organelles helps in determining that the cell is Eukaryote, but the presence of cell wall will be of no help as both the prokaryotes as well as eukaryotes contain cell wall.
Hence, the correct answer is 'cell wall'.
im pretty sure its just the first and second options
hope this helps :D
