-All living thing begins life as a single cell.
-The cell is the basic unit of the structure and function of life.
-It takes many cells to make a complex organism.
-All living cells always come from other living or dead cells.
I believe it is D, the reason being is because they form on their own, not from a living or dead organism. It can't be B because that is true, and the same for C. hope this helps, have an amazing day :)
