How does this text answer the essential question?
What does it mean to truly grow up?

To be a grown-up means living a principled life, one with a commitment to certain values and putting those values to work in more than words. Life is made more interesting and engaging by doing it, too. The mature person is not simply a spectator to the game playing out before him.

Explanation:

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering