Narrative reiterates the statement, "it's not as much as what you know as you know?

1.where
2.who
3.when

The correct answer is:

2.Who

Explanation:

"It's not as much as what you know as who you know"

This could be considered a popular saying or idiom, in order to point about the importance in life to be well related. The group of friends in the different social fields of life such as education, work environment, hobbies, exercise among others, could be of great impact for the growing process in our lives, due to the fact that good connections from the known people could lead to great opportunities in life.