【单选题】Regarding the topological sorting algorithm, the following statement is incorrect ________.
A.
The larger the entry value of the vertex, indicating that the more preconditions it has, the further back it must be in the topological sequence
B.
The correct topological sequence can only be obtained by entering the DAG plot
C.
Algorithm error if non-DAG graph is entered
D.
The topological sequence of a given DAG graph may not be unique