Answer:
B, -1 1/2.
Explanation:
One sees that the number -1 1/3 is 8 units to the left of 0 on the above number line, where 1 unit represents a division of 1/6.
Thus, when subtracting 1/6 from -1 1/3, this represents shifting an additional unit to the left, which is -1 1/2.