Which of the Following Is an Example of Self-Plagiarizing

Which of the following is an example of self-plagiarizing?

A) Kristy wrote a paper in Sociology class last semester on geriatric care management. She decides to turn that material into an informative speech.
B) Kristy's mother wrote a paper in her college class on geriatric care management, so Kristy uses her mother's research as a starting point for hers.
C) Kristy worked in a nursing home during the summer, so she relies on her personal experience as the basis of her speech.
D) Kristy sees a speech outline on the internet that covers the same points she wants to include in her speech, so she uses that framework as the basis for her speech.