Which sentence is a correct example of an in-text citation?
o
a. henie's biographer, peter vilonen, relates that "sonja finished last
in her first event when she was only eleven" (vilonen 38).
b. henie's biographer peter vilonen, believes that henie "truly was
the best performer ever" (vilonen 67).
o
c. according to peter vilonen's biography of the athlete, henie's
family was wealthy enough for her to pursue her skating dreams.
(peter vilonen 72
o
d. according to peter vilonen's biography of the athlete, sonja henie
won three olympic gold medals as a norwegian figure skater (59).