THE ANSWER IS LETTER A BECAUSE IT ELABORATES ON WHAT IS ALREADY EXPLAINED ON THE FIRST SENTENCE
Do some research to support what you will say, don't plagiarize. Have contect to support your case.
Answer:
the children enter Narnia and discover the White witch has taken Tumnus Aslan returns to Narnia and breaks the witches spell in Christmas around Edmund betrayed his siblings and must forfeit his love to the White witch