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

Question content area bottom

Part $1$

$A.$

Observation

$B.$

Secondary research

$C.$

Focus groups

$D.$

Primary research

$E.$

Interviews