Answer:
The correct answer option is C. mitochondrion.
Step-by-step explanation:
Mitochondrion is the organelle which produces most of the cell's adenosine triphosphate (ATP).
Mitochondria are virtually cells within a cell which use the available Oxygen within the cell to convert the chemical energy from food in the cell to energy in a form which is usable by the host cell.
This helps to produce a chemical called NADH which is then used by enzymes in the mitochondrial inner membrane to generate adenosine triphosphate (ATP).