${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}\text{r}\text{e}\text{f}\text{e}\text{r}\text{s}to\text{t}\text{h}\text{e}\text{n}\text{u}\text{m}\text{b}\text{e}\text{r}of\text{s}\text{u}\text{b}\text{o}\text{r}\text{d}\text{i}\text{n}\text{a}\text{t}\text{e}\text{s}\text{t}\text{h}\text{a}\text{t}\text{a}\text{m}\text{a}\text{n}\text{a}\text{g}\text{e}\text{r}\text{c}\text{a}\text{n}\text{e}\text{f}\text{f}\text{i}\text{c}\text{i}\text{e}\text{n}\text{t}\text{l}\text{y}\text{a}\text{n}\text{d}\text{e}\text{f}\text{f}\text{e}\text{c}\text{t}\text{i}\text{v}\text{e}\text{l}\text{y}\text{m}\text{a}\text{n}\text{a}\text{g}\text{e}\text{.}}$

Question $24$Select one:

$A.$

Chain $of$ command

$B.$

Span $of$ control

$C.$

Responsibility

$D.$

Unity $of$ command