Question

The etiquette should not be broken because ____.

• A. it may cause public disgrace
• B. it may create misunderstandings
  
• C. it may hurt feelings
• D. all of the above

Answer 1

The correct option is D all of the above

The line: "Violations of etiquette can cause public disgrace, and in private hurt individual feelings, create misunderstandings or real grief and pain." includes all three options: It may cause public disgrace (option A), it may create misunderstandings (option B) and it may hurt feelings, or create real grief and pain (option C).
Hence option D is correct: all of the above.
Options A, B and C are all individually, incorrect.