Answer:
him accepting the lieutenant's challenge
Explanation:
D, her.
'her' is the female possessive, and we are talking about 'her own unique way.'
Since the way is hers, you use the possessive form.
They must not base their conclusions on a.opinions
Basically the author is saying that to achieve the potential this generation has, we need to influence the world and take up challenges in a positive way. <span />