${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}\text{a}\text{r}\text{e}\text{i}\text{n}\text{v}\text{o}\text{l}\text{v}\text{e}\text{d}in\text{e}\text{t}\text{h}\text{i}\text{c}\text{a}\text{l}\text{i}\text{s}\text{s}\text{u}\text{e}\text{s}\text{r}\text{e}\text{l}\text{a}\text{t}\text{e}\text{d}to\text{c}\text{o}\text{n}\text{s}\text{u}\text{m}\text{e}\text{r}\text{s}\text{.}}$

Question $15$Select one:

$a.$

Security

$b.$

Product Price

$c.$

Product Quality

$d.$

All $of$ the above

$e.$

None $of$ the above