Answer:
d. Values
Step-by-step explanation:
The question above is related to "Ethics."
Values refer to a person's feeling of what is right and wrong. For example, one person may think stealing from other people is right while another person may think it's wrong. Both of them have different values in life and it affects how they behave or act in the society, and it also influences their intentions.
This is the most difficult to change because it is something that a person considers normal or is something that his group or community is expecting him to follow.