According to the author, writing ______.
A.
is basically a self-taught occupation and no instructions on how to deal with it are of any practical use
B.
is a 'trial and error' process and it does not count whether you have the gift for writing or not
C.
for a living is the most difficult and risky of all careers, full of frustration and discouragement
D.
sometimes provides good hopes of winning public praise and escaping humiliating poverty