Which cause-and-effect relationship in “The Bridge” relates to the theme “Sometimes help is found in the most unexpected of places”?

Because the narrator is late for his appointment with his math tutor, his parents tell him he can no longer play in his band.
Because the narrator’s parents grew up in India, he believes they do not understand his deep passion for music.
Because the narrator loses track of time during band practice one evening, he is late getting home for his math tutoring session.
Because the narrator’s math tutor explains the mathematical benefits of music to the narrator’s parents, the narrator is able to rejoin his band.