${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{r}epresent\text{t}\text{h}\text{e}\text{o}\text{n}\text{l}\text{y}\text{l}\text{i}\text{v}\text{e}\text{,}\text{r}\text{e}\text{a}\text{l}-\text{t}\text{i}\text{m}\text{e}\text{f}\text{o}\text{r}\text{u}\text{m}in\text{w}\text{h}\text{i}\text{c}\text{h}\text{c}\text{a}\text{n}\text{d}\text{i}\text{d}\text{a}\text{t}\text{e}\text{s}stand,\text{s}\text{i}\text{d}\text{e}by\text{s}\text{i}\text{d}\text{e}\text{,}discussing\text{p}\text{o}\text{l}\text{i}\text{c}\text{y}\text{i}\text{s}\text{s}\text{u}\text{e}\text{s}\text{.}}$

Question $20$ Select one:

$a.$

Convention speeches.

$b.$

Comparison ads.

$c.$

Press conferences.

$d.$

Debates.