It can be either diffusion, osmosis or active transport. depending on what is transported and how in which net direction they're moving.
Cells that have no mitochondria are unable to convert oxygen into energy, found in the form of adenosine triphosphate (ATP). All multicellular eukaryotic organisms, including plants and animals, have mitochondria in some cells, but prokaryotes and some single-cell eukaryotes do not have mitochondria.
A
A is correct for this problem
