${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{a}re\text{l}\text{a}\text{r}\text{g}\text{e}\text{,}\text{c}\text{o}\text{m}\text{p}\text{l}\text{e}\text{x}\text{s}\text{y}\text{s}\text{t}\text{e}\text{m}\text{s}\text{t}\text{h}\text{a}\text{t}\text{c}\text{o}\text{n}\text{s}\text{i}\text{s}\text{t}of\text{a}\text{s}\text{e}\text{r}\text{i}\text{e}\text{s}of\text{i}\text{n}\text{d}\text{e}\text{p}\text{e}\text{n}\text{d}\text{e}\text{n}\text{t}\text{s}\text{y}\text{s}\text{t}\text{e}\text{m}\text{m}\text{o}\text{d}\text{u}\text{l}\text{e}\text{s}\text{.}}$

Question $19$ options:

Supply chain management systems

Customer relationship management systems

Transaction processing systems

Enterprise$-$wide systems