Which sentences include transitions? Select all that apply. Serena Williams is not only an exceptional athlete, she's also a positive role model. First, she is a United Nations Children’s Fund (UNICEF) Goodwill Ambassador. As a result of her Schools for Asia campaign, twenty-six million Asian students received an education. Next, she developed a clothing line that advocates for women to feel comfortable and strong in their own skin. Therefore, Serena has established herself as a champion both on and off the tennis court.