Answer:
correct answer is option c (A 4-year-old who believes rules are firm and unchangeable is reflecting Piaget's heteronomous stage of moral development.)
Step-by-step explanation:
Heteronomous morality:
The stage of heteronomous morality is also known as moral realism. Children regard morality as obeying other people's rules and laws, which cannot be changed. During this stage children consider rules are firm and unchanging they thought that all rules are made by some authority figure like teacher, God, some elderly person or parents. Children of this age thought that if they will break the rules then they will be punished immediately for it.