An equipment manufacturer has submitted a sample product to improve a manufacturing process. Experiments indicate that the performance of the product has a mean of 12 and standard deviation of .04. The desired performance has a mean of 12 +/- .02 standard deviations, so, if used, the process capability index would be which of the following?
A) .2
B) .3
C) .5
D) 1.0
E) 1.2