Can we draw the following hypothesis from the context (see options)? 

Context:

Denis Hale Johnson (July 1, 1949 – May 24, 2017) was an American writer best known for his short story collection "Jesus' Son" (1992) and his novel "Tree of Smoke" (2007), which won the National Book Award for Fiction. He also wrote plays, poetry, journalism, and non-fiction.

Hypothesis: He wrote over 10 books in his lifetime
pick from the following.
 (a). Yes
 (b). It's impossible to say
 (c). No
(b).