A. To avoid trouble
B. To be dishonest
C. To clean up after oneself
D. To help others
Answer: To avoid trouble
A. To avoid trouble
B. To be dishonest
C. To clean up after oneself
D. To help others
Answer: To avoid trouble
Additional Information: 'Keep your nose clean' means to stay out of trouble.
Subjects: Idioms and Phrases, Vocabulary