Product Profit Margins Are Typically Judged on A $\begin{array}{ll}\underline{\text { Peniod-by-period basis }} & \underline{\text{Life-cycle basis} }\end{array}$

Product profit margins are typically judged on a

$\begin{array}{ll}\underline{\text { Peniod-by-period basis }} & \underline{\text{Life-cycle basis} }\end{array}$

A) yes yes
B) yes no
C) no yes
D) no no