${?}_{{?}_{{?}_{?}}{?}_{i}s\text{a}\text{d}\text{i}\text{s}\text{a}\text{d}\text{v}\text{a}\text{n}\text{t}\text{a}\text{g}\text{e}of\text{v}\text{i}\text{r}\text{t}\text{u}\text{a}\text{l}\text{i}\text{z}\text{a}\text{t}\text{i}\text{o}\text{n}(choose\text{t}\text{w}\text{o}).}$

Group $of$ answer choices

Fault and threat isolation

Single point $of$ failure

Licensing costs

Cost and energy savings