I believe that the answer is A, to emphasize a point.
The correct answer is A. Odyssean journey
This is an allusion to the great Greek epic Odyssey, and requires people to know what happens in the Odyssey to understand.
There is no way that a line drive was traveling 100 mph
The correct answer is D. it tells of the origins of something.
Here we can see how the horse came to be - it was made out of clay and shaped into a horse, and this is why today we have horses, at least according to this myth. Myths have often been created to explain the origin of many things that were usually inexplicable at the time.