When the upper specification limit is 25.5 mg and the lower specification limit is 18.5 mg, the process mean is 20.35 mg, and the standard deviation is 0.491 mg, which of the following statements is true?
A. The Cpk is 0.62
B. The Cpk is 1.73
C. The process is centered between the specification limits.
D. The process will have capable outputs.