$8\mathrm{.}56$ Jewel$-$Osco evaluated three different pay$-$by$-$touch systems that identify a eustomer by a finger scan and automatically deduct the amount of the bill directly from their checking account. The revenue alternatives were ranked according to increasing initial investment and identified as alternatives $A.$ B$,$ and C$.$

$\backslash$table$[[$Comparison$,$F$.\%,$N; $\%],[$A to DN$,23\mathrm{.}4,],[$B to DN$,8\mathrm{.}1,],[$C to DN$,16\mathrm{.}6,],[$B vs$.$ A$,,-5\mathrm{.}1],[$C vs$.$ A$,,12\mathrm{.}0],[$Cvs$.$ B$,,83\mathrm{.}9]]$

Based on the alternative ROR values $(i^{**}),$ the incremental ROR values $(i^{**}),$ and the company's MARR of $16\%$ per year, the alternative to select is:

$($a$)$ A

$($b$)$ B

$($c$)$ C

$($d$)$ DN