Which sentence in the passage uses the colon correctly?

(after years of conforming to her parents' wishes and ideals: allison had finally decided to rebel.) she was tired of constantly having the weight of her parents' expectations on her shoulders. (she had made up her mind to travel westward: and pursue her dreams of becoming a she had been participating in songwriting contests since she was ten: nothing fulfilled her more than music.)she risked her parents' wrath because she knew they would understand her once she succeeded. (so, without any hesitation, allison made up her mind: to continue pursuing her dreams.)