Sometimes, distinguishing the type of interaction between species in not straightforward. Remoras are fish that are often found attached to larger animals, such as sharks. The relationship between remoras and sharks is often described as a commensalism. Although this suggests that sharks do not benefit from this relationship, remoras sometimes consume parasites on their skin. Which of the statements below best supports the relationship being a commensalism?
A) Although remoras consume parasites, sharks with remoras show no better health or growth than sharks without remoras.

B) Although remoras consume parasites, they usually consume the flesh of the shark itself and harm it.

C) Remoras consume parasites, but sharks depend on parasites to remain healthy.

D) The fact that remoras consume parasites suggests that they provide a benefit, making this a commensal relationship.