Here's a problem to solve: In a completely cooperative relationship, each organism benefits equally. Which sequence lists these relationships in order of increasing cooperativeness?

Among the 4 following options, which is the correct answer?

- A: commensalism, mutualism, parasitism, predation
 
- B: parasitism, commensalism, predation, mutualism
 
- C: predation, parasitism, commensalism, mutualism
 
- D: mutualism, commensalism, parasitism, predation
 