Which statement most accurately describes the process of respiration

Hello. This question is incomplete. The full question is:

"Which statement most accurately describes the process of respiration?

a. It occurs only in plants during the daylight hours and usually involves the exchange of gases.  b. It occurs only in plants during the daylight hours and involves the taking in of preformed organic molecules.  c. It occurs continuously in the cells of all organisms and involves the synthesis of carbohydrate molecules.  d. It occurs continuously in the cells of all organisms and often involves an exchange of gases."

d. It occurs continuously in the cells of all organisms and often involves an exchange of gases.

Explanation:

Cellular respiration is a process in which the cell produces energy from glucose and in the presence of oxygen. This process, which occurs in the cytoplasm and mitochondria, is extremely important and complex, being responsible for the complete oxidation of glucose, which obeys the following reaction: C6H12O6 + 6O2 → 6CO2 + 6H2O + ENERGY

Cellular respiration occurs continuously in the cells of all organisms and often involves an exchange of gases, as you can see in the equation above.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: