Final answer:
Individual level variables in moral development include preferred ethical theory, and the individual's decision style and locus of control, each influenced by personal experiences and characteristics. The correct choices from the given options are: a, and d.
Step-by-step explanation:
The variables in moral development that are unique to the individual level include preferred ethical theory, decision style and locus of control.
The preferred ethical theory is where an individual aligns themselves with a specific school of ethical thought, such as utilitarianism, deontology, or virtue ethics. Each person may favor different ethical lenses through which they view moral dilemmas.
Decision style and locus of control relate to how individuals make choices and perceive the forces that impact their lives. A person with an internal locus of control believes that they have personal agency over their actions and their consequences, aligning closely with moral decision-making, whereas an external locus of control may suggest that outside forces have greater influence.
Therefore, these components are unique to each person, influenced by an individual's experiences, upbringing, education, and personality, and play critical roles in shaping one's moral development.