${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}isan\text{u}\text{n}\text{s}\text{t}\text{r}\text{u}\text{c}\text{t}\text{u}\text{r}\text{e}\text{d}\text{,}\text{e}\text{x}\text{p}\text{l}\text{o}\text{r}\text{a}\text{t}\text{o}\text{r}\text{y}\text{r}\text{e}\text{s}\text{e}\text{a}\text{r}\text{c}\text{h}}$

methodology based $on$ small samples intended

$to$ provide insight and understanding $of$ the

problem setting.

$a.$ Primary research

$b.$ Qualitative research

$c.$ Secondary research

$d.$ Quantitative research