You will be given a definition of a task first, then some input of the task.
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.

Context: The North Fork Feather River is a watercourse of the northern Sierra Nevada in the U.S. state of California. It flows generally southwards from its headwaters near Lassen Peak to Lake Oroville a reservoir formed by Oroville Dam in the foothills of the Sierra where it runs into the Feather River. The river drains about 2100 square miles (5400 km2) of the western slope of the Sierras.
Question: The document can be classified to which topic?
Options: 1)Athlete, 2)Animal, 3)NaturalPlace, 4)EducationalInstitution, 5)Film
Output:
3