Respuesta :
C) The frost giants will join him. The reason for this is that the rest of the paragraph is written in future tense except for that sentence.
Answer:
The answer that corrects the mistake is The frost giants will join him.
Explanation:
To have a coherent and cohesive writing it has to keep continuity in the conjugation of the verbs and general structure of sentences to have parallelism between them, this is the only sentence that is not following the structure of a future tense sentence with the use of the modal "will", then by changing it the paragraph has a correct structure.