${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{c}an\text{d}\text{e}\text{s}\text{c}\text{r}\text{i}\text{b}\text{e}\text{a}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{c}\text{l}\text{a}\text{s}\text{s}\text{,}\text{a}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{f}\text{o}\text{r}\text{m}\text{,}or\text{a}\text{b}\text{r}\text{a}\text{n}\text{d}\text{.}}$

Question $7$Select one:

$a.$

The product life cycle concept

$b.$

Business analysis theory

$c.$

Portfolio analysis

$d.$

The product development process

$e.$

Vendor analysis theory