Answer:
A). The mind/body problem.
Explanation:
As per the given description, the distinction in their opinions indicate 'the mind/body problem' as they exemplify the argument associated to describe the association between the responsiveness and thought that comes in human mind and physical body part 'brain'. Doug is of the view that 'mind' is mere the outcome of the functioning of the brain while Renne's view in contradicting the previous view of Doug by stating that 'every individual possesses a mind that is distinct from our physical body. Thus, this debate gives rise to the question that both the units(mind and body) are distinct or unified. Thus, option A is the correct answer.