Answer: I would contend that the right answers are 1) A book about Ball’s impact as a performer, 4) A review of Ball’s television show and 6) An interview with Ball’s costars.
Explanation: The question is asking specifically which of these sources are secondary sources, which are sources that interpret or discuss primary sources—firsthand evidence about a historical event, person, or artifact. An autobiography, an interview, and an acceptance speech are all direct and original evidence, since those contain Ball's actual and immediate words. However, a book about the performer, a review of her show, and an interview with her costars are not primary sources, since those are reflections and commentaries on her and on her performances made by other people.
