Read the following sentence from the text:

"Not knowing it to be stolen—the young man was an entire stranger to him, and though I suspected that he was an unscrupulous adventurer, the boy has not had experience enough to judge men."

Which two words best represent the meaning of the word "unscrupulous" in the sentence?

A. brave
B. youthful
C. dishonest
D. unfamiliar
E. risky
F. devious