${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{i}san\text{e}\text{m}\text{e}\text{r}\text{g}\text{i}\text{n}\text{g}\text{s}\text{o}\text{f}\text{t}\text{w}\text{a}\text{r}\text{e}\text{t}\text{r}\text{e}\text{n}\text{d}\text{w}\text{h}\text{e}\text{r}\text{e}an\text{a}\text{p}\text{p}\text{l}\text{i}\text{c}\text{a}\text{t}\text{i}\text{o}\text{n}\text{c}\text{a}\text{n}\text{w}\text{o}\text{r}\text{k}\text{a}\text{c}\text{r}\text{o}\text{s}\text{s}\text{v}\text{a}\text{r}\text{i}\text{o}\text{u}\text{s}\text{d}\text{e}\text{v}\text{i}\text{c}\text{e}\text{s}\text{w}\text{i}\text{t}\text{h}\text{a}single\text{v}\text{e}\text{r}\text{s}\text{i}\text{o}\text{n}\text{.}}$

Question $44$ options:

Continuous deployment

$UX$ Design

Grid computing

Cross platform development