Answer:
C.
Step-by-step explanation:
In the novel Refugee, after Nazis broke into the house of Josef and took his father (Aaron) away, Josef, his mother, and sister then went to search for Aaron. After coming to know that Josef was sent to Dachau's concentration camp, they try to make their way to the camp to search for him.
When Josef and his family reached Havana harbor, where MS St Louis ship called Josef tells that he (Aaron) was in Dachau before the boat called. Therefore, option C is the correct answer.