Answer:
The correct options are - A, B, and D.
Explanation:
Cell theory is a historical theory about the cell that is presented in 1839. The scientists that are credited for cell theory are Robert Hooke, Rudolf Virchow, and Matthias Schleiden, Theodor Schwann.
The major three points of the cell theory that are universally accepted as follows:
1. All livings are composed of one or more cells.
2. All cells are produced by or come from pre-existing cells.
3. The cell is the fundamental, structural and functional unit of life in every living organism.
Thus, the correct answer is - A, B, and D.