Given the task definition and input, reply with output. 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: Boechera laevigata is a species of flowering plant in the mustard family known by the common name smooth rockcress. It is native to many areas of the eastern United States and Canada where it grows in calcareous rocky woods and bluffs. It is moderately common throughout its range although it is absent from the southeastern coastal plain and the far north.This species is a biennial herb growing from a single stem. It flowers in early spring and has persistent fruit.
Question: The document can be classified to which topic?
Options: 1)Animal, 2)MeanOfTransportation, 3)OfficeHolder, 4)Plant, 5)EducationalInstitution
4