Which of the Following Helps Explain Why the Principle of Deontology

Which of the following helps explain why the principle of deontology may be difficult to apply?

A) People disagree about what duties we owe to one another and which duties are more important.
B) People disagree about whether consequences are positive or negative.
C) People disagree about the ethics of care.
D) People disagree about what duties we owe to one another and also whether consequences are positive or negative.
E) People disagree about what duties we owe to one another, whether consequences are positive or negative, and about the ethics of care.