Which statement from a research paper is a example of plagiarism?

a) President Franklin D. Roosevelt once famously said "The only thing we have to fear is fear itself."
b) The climate of the earth "likely will continue to warm this Century," according to a recent study released by the National Aeronautics and Space Administration.
c) In the novel, the characters are living "lives of quiet desperation" in which they show a deep unhappiness with their fates in life.
d) In his autobiography, Up From Slavery Booker T. Washington wrote "I had the feeling that to get into a schoolhouse and study would be about the same as getting into paradise."