Given the error message: "./ : error: cannot find symbol abstract LinkedList> levelOrderTraversal();"
What does the error message indicate? Select the most appropriate answer.
A. The code is missing a semicolon at the end of the line.
B. The LinkedList class is not imported or referenced correctly.
C. The BinaryNode class is not imported or referenced correctly.
D. The method levelOrderTraversal() is not defined or cannot be found.