Q: In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.
Anna won a pair of tickets for a cruise. She invited her boyfriend, Zach, to join her. Zach agreed to go even though he hates boats. While on the cruise, Zach got terrible motion sickness. Anna had to take care of him the entire trip.
Why had Anna to take care of him the entire trip?
A:
While on the cruise, Zach got terrible motion sickness.