My sister is back in the states ! She was in Africa for 10 weeks doing humanitarian work , and now she is finally home ! It feels so good to have her back and safe .

Generate a question about the above context.
Why did my sister go to Africa ?
Pick your answer from:
[A]. She wanted to help people.
[B]. She did not want to be in the states.
[C]. She wanted to help me.
[D]. None of the above choices ..