${?}_{{?}_{{?}_{?}}{?}_t\text{a}\text{k}\text{e}\text{s}\text{p}\text{l}\text{a}\text{c}\text{e}on\text{e}\text{a}\text{c}\text{h}\text{m}\text{o}\text{d}\text{u}\text{l}\text{e}(subtask\text{c}\text{o}\text{d}\text{e})asitis\text{c}\text{o}\text{m}\text{p}\text{l}\text{e}\text{t}\text{e}\text{d}\text{.}}$

Group $of$ answer choices

Regression testing

System testing

Unit testing

Integration testing