U have a lot of strwngerh
It should be moved to the beginning of the sentence, that means, that it should be placed before "The motorcycles raced" (option A).
Explanation: "down the track" is a prepositional phrase. All prepositional phrases have no verbs nor subjects. These can be used as adjectives or adverbs. They can be placed either after the verb and at the begining of a sentence. When placed at the beginning of a sentence, it sounds more formal than the common structure composed of 'subject + verb + predicate' and this construction has to be followed by a comma.
In this case, the answer would be:
'Down the track, the motorcycles raced for the prize'.
Both of the fathers are violent and negative.
The script, or text of a play contains B. dialogue and stage directions.
The author writes stage directions so both the actors and the audience know what is going to happen and to set the stage better. A play without dialogues (or monologues) is not possible, is it?