Detailed Instructions: In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Q: Context: USS Oswald (DE-767) was a Cannon-class destroyer escort built for the United States Navy during World War II. She served in the Atlantic Ocean and provided escort service against submarine and air attack for Navy vessels and convoys.
Question: The document can be classified to which topic? 
Options: 1)MeanOfTransportation, 2)Company, 3)Athlete, 4)Village, 5)Album
A:
1