All highly successful salespersons are both well organized and self-motivated, characteristics absent from many salespersons who are not highly successful. Further, although only those who are highly successful are well known among their peers, no salespersons who are self-motivated regret their career choices.

Question: If all of the statements above are true, which one of the following must be true?
Options:
A. No self-motivated salespersons who are not highly successful are well organized.
B. All salespersons who are well organized but not highly successful are self-motivated.
C. No salespersons who are well known among their peers regret their career choices.
D. All salespersons who are not well organized regret their career choices.
E. All salespersons who do not regret their career choices are highly successful.
Answer: "C"