Cate arrived home from Sydney late last night totally exhausted . WYD week had been absolutely full on . She did enjoy herself , thought was more than happy to come home as she said she was sick of the crowds of people by the end of the week , wanted her own space again , and was pleased to be going back to school this morning for a rest lol .

Question: What may have caused Cate to arrive home exhausted ?
Answer: She had just got back from school .She finished travelling for school .She finished travelling .None of the above choices .