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

Question $5$ options:

Endorsement

Umbrella branding

Word $of$ mouth

Institutional advertising