${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}\text{r}\text{e}\text{f}\text{e}\text{r}\text{s}to\text{d}\text{i}\text{r}\text{e}\text{c}\text{t}\text{l}\text{y}\text{t}\text{r}\text{a}\text{n}\text{s}\text{l}\text{a}\text{t}\text{i}\text{n}\text{g}an\text{i}\text{n}\text{s}\text{t}\text{r}\text{u}\text{c}\text{t}\text{o}\text{r}-\text{l}\text{e}\text{d}\text{,}\text{f}\text{a}\text{c}\text{e}-to-\text{f}\text{a}\text{c}\text{e}\text{t}\text{r}\text{a}\text{i}\text{n}\text{i}\text{n}\text{g}\text{p}\text{r}\text{o}\text{g}\text{r}\text{a}\text{m}toan\text{o}\text{n}\text{l}\text{i}\text{n}\text{e}\text{f}\text{o}\text{r}\text{m}\text{a}\text{t}\text{.}}$

Question $7$ options:

Rapid prototyping

Self$-$directedness

Blended learning

Repurposing