To calculate the range of a data set, you subtract the minimum value from the maximum value.
In your data set (4, 5, 6, 8, 11, 12), the maximum value is 12 and the minimum value is 4.
So, the range is calculated as follows:
12 - 4 = 8.
Thus, the correct option for calculating the range is:
Subtract 12 - 4.