ABC manufacturing has received an order to produce a rod 8 inches in diameter +/- 0.35 inch. In sample runs, the machine tool that will be making the rod has been able to produce rods with a mean diameter of 5.99 inches and a standard deviation of 0.55 inch. The process capability index for this process is A. 4.59 B. "-0.30" C. "-1.01" D. 1.43