The correct answer is C. considerate.
A callous attitude is one that is unfeeling or insensitive. It is the opposite of being considerate, which means to be thoughtful and caring about others. A person with a callous attitude towards their duties would not be concerned about the consequences of their actions or the impact they have on others. They would be more likely to act in their own self-interest, even if it meant harming others.
A cooperative attitude is one that is willing to work with others. A cautious attitude is one that is careful and avoids taking risks. A courteous attitude is one that is polite and respectful.
In the context of the question, the only option that is consistent with a positive attitude towards one’s duties is C. considerate. A considerate person would be thoughtful about the impact their actions have on others and would be willing to put in the effort to do their job well.