单选题：In the Tic-tac-toe game, a "goodness" function of a position is

In the Tic-tac-toe game, a "goodness" function of a position is defined as `f(P) = Wcomputer − Whuman`
where `W...` is the sum of all potential win lines with the weight of 1，2 or 3 if 0, 1 or 2 pieces is/are in the line respectively. In the following figure, `O` represents the computer and `X` the human. What is the goodness of the position of the figure? @[A](2)






A. -1
B. 0
C. 1
D. -2




A.-1
B.0
C.1
D.-2


答案：A