Sentence 1: Tanya had just turned sixteen. 
 Sentence 3: She already knew what color she wanted and everything 
 Sentence 4:  Yet at the last moment she had her doubts 
 Sentence 5:  She decided to give her own natural hair color a chance 
 Option 1: Her mom had let her dye her hair years ago. 
 Option 2: Her mom would never let her dye her hair before she was this old.