The answer is B. foreshadowing
Answer: The word "invigorating" would leave the reader with a more positive impression about the coffee than the word "acidic."
Explanation:
The adjective "acidic", in this context, is used to describe a drink that has a sour taste. If a coffee is sour, it means that it is not prepared properly, or that the coffee prepared is of a low quality. On the other hand, word "invigorating" has a more positive connotation. If something is invigorating, it gives us strength and makes us full of energy. This is exactly what people usually expect from a coffee. Having this in mind, word "invigorating" would certainly leave a reader with a positive impression about the coffee and its smell.
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'.