(ENGLISH) HELP ASAP

What is the main way the author shows how Edward kept becoming more and more successful?

A.
by explaining the mistakes he had to correct to succeed in each job
B.
by giving examples of the unexpected hardships he had to overcome
C.
by describing each position he tried to get even if he did not succeed
D.
by showing what had inspired him each time he improved his business

ONLY CHOOSE ONE