Research of which approach to authentic leadership was conducted using interviews of successful leaders?

The answer is the George’s practical model. This is a research used for approaching leadership with the use of having to use interviews where in successful leaders are being interviewed to gain a more better understanding or basis in differentiating leadership.

is there answer choices?

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.