The correct answer for the question that is presented is this one: "The Greeks inside the horse remain quiet because if they create noise, their plan won't be easily be done. The reason why they stay inside the horse because they want to secretly go inside the place and start to attack.
C. In the daytime I ran by her side, and at night I lay down close to her.
By showing that the narrator followed around their mother, it creates the idea that the narrator is dependent on her.
Hope this helps, good luck mate! :D