The Peach State Onion Company's onion$-$bagging machine was found to operate at mean $=25\mathrm{.}05$ pounds with a standard deviation of $0\mathrm{.}129$ pounds. The company product specification calls for a bag weight of $25lbs.+1-0\mathrm{.}45$ lbs$.$

Determine the process capability index.

A$.1\mathrm{.}16$

B$.0\mathrm{.}49$

C$.1\mathrm{.}03$

D$.1\mathrm{.}29$