Read this sentence from passage 1. Story: Passage 1: from To sea: A voyage of discovery by Jeff Hendricks

"this was the beginning of a ROUTINE." (paragraph 10)

What is the meaning of the word ROUTINE as it is used in the passage?
A. agreeing to a plan with others
B. developing a secret friendship
C. making a decision to learn more
D. following a repeated set of actions

D. following a repeated set of actions