Strong Attitudes Are More Resistant to Persuasion Because

Strong attitudes are more resistant to persuasion because

A) people who hold strong attitudes have logically reviewed numerous arguments for and against their initial position.
B) people who hold strong attitudes are less certain that their position is correct.
C) strong attitudes are more related to additional features of the person.
D) people who hold strong attitudes are more likely to systematically process the arguments against their initial attitudes.