Answer:
B. Accidental.
Explanation:
As seen in the given passage, the discovery of coffee by the goat herder Kaldi was evidently accidental. He had not intended on discovering the 'energy drink' nor did he know they were energy boosters.
This discovery was not even first detected in humans. It was consumed by goats that made them more active, which led Kaldi to try for himself. And it was then that he realized the energy the beans gave him. This led to what we now daily consume.
Thus, the correct answer is option B.
