The dotplot below displays the difference in scores for 18 games between a high school soccer team and its opponent. A dotplot titled difference in Score. A number line going from negative 2 to 4 is labeled Team score minus opponent score. Negative 2, 1; negative 1, 2; 0, 2; 1, 3; 2, 6; 3, 3; 4, 1. Point A is between negative 1 and 0, B is between 0 and 1, C is at 1.5, and D is at 2.

Which letter represents the approximate location of the mean difference in score?

A
B
C
D