John is a newly minted quality engineer at Ops Inc. His boss intending to promote higher quality in the company, tells him to increase the process capability index of their main product. John decides to simply increase the upper specification limit and reduce the lower specification limit. Choose the correct sentence.

A) The process capability index does not increase, because the variation in the process is unchanged.

B) The process capability index does not increase, because the process capability index would only change if the control limits were changed.

C) The process capability index does increase, though one might question if the underlying process really is better.

D) The process capability index does increase, which is why the process quality is reduced.

E) More data is needed to answer the question