The correct answer is C. Children begin to consider what society considers moral and immoral.
Step-by-step explanation:
Lawrence Kohlberg was an American psychologist born in 1927 mainly known for his theory related to the development of moral according to different stages. In this way, Kohlberg proposed three phases that are the pre-conventional phase, the conventional phase and the post-conventional.
In the pre-conventional individuals and especially children consider direct consequences to develop moral including punishment and self-interest; in the conventional phase social norms or conventions or incorrect/correct or moral/immoral are considered by children, teenagers or adults to take a position and developed morality and finally in the post-conventional phase individual follow their own perspective and establishes the difference between moral and immoral by himself rather than by society.
Considering this, the one that would occur in the conventional level according to Lawrence Kohlberg is "Children begin to consider what society considers moral and immoral" because this phase deals with the parameters, norms or conventions established by the society regarding morality.