In the debate over whether feelings of duty are innate or implanted, what does John Stuart Mill argue for the purposes of his theory?
A) Mill asserts that feelings of duty are entirely innate, with no external influence.
B) Mill contends that feelings of duty are solely implanted through external factors.
C) Mill argues that the origin of feelings of duty is irrelevant to his ethical theory.
D) Mill supports the idea that feelings of duty are a combination of innate tendencies and external influences.