Lewis Burwell Puller Jr. (August 18, 1945 May 11, 1994) was an attorney and a former United States Marine Corps officer who was severely wounded in the Vietnam War. He won the 1992 Pulitzer Prize for Biography or Autobiography for his autobiography "Fortunate Son".
Does this next sentence follow, given the preceding text?
Lewis Burwell Puller Jr. served two tours in Vietnam.

Options: a. Yes. b. It's impossible to say. c. No.
b.