Step 1: Understanding the Concept:
Lawrence Kohlberg applied cognitive-developmental principles to explain how children understand gender.
He proposed that children actively construct their understanding of gender as their cognitive abilities mature.
Step 2: Detailed Explanation:
Let us examine the stages of Kohlberg's cognitive-developmental theory of gender:
1. Basic Gender Identity (typically achieved around ages 2--3):
During this stage, children become aware of gender as a social category and can label themselves and others as male or female.
Once they establish this basic identity, they begin to use "boy" and "girl" as categories to organize information about their social world.
They start paying attention to gender-typed behaviors, toys, and roles.
2. Gender Stability (typically achieved around ages 3--4):
Children realize that gender remains stable over time (e.g., a boy will grow up to be a man).
3. Gender Constancy (typically achieved around ages 5--7):
Children understand that gender remains constant across different situations and changes in appearance (e.g., a girl remains a girl even if she cuts her hair short or wears pants).
Step 3: Final Answer:
Children first become aware of gender as a social category during the Basic Gender Identity stage.
Thus, Option (A) is correct.