The development of self-awareness is demonstrated by

A) 9-12 months.
B) 18-24 months.
C) 6-9 months.
D) 3-6 months.

According to research, self-awareness typically develops between the ages of 18-24 months. This is when children begin to recognize themselves in the mirror and understand that they are a separate individual from others. While some signs of self-awareness may be present at 9-12 months, it is not fully developed until later. Self-awareness is unlikely to be present at 6-9 months or 3-6 months.