The answer is D, purpose. The writer wants the readers to feel a certain way, so I would think that answer choice D makes the most sense.
In 'Lagoon' Arsat was overwhelmed with the serious illness of diamelen,his lover.Naturally he was afraid of her death. So when he saw white man ,he asked for medicine from him to revive her from illness. So Yes I believe he does get the medicine
Terror is the only logical answer