Which of the following statements about gender identity is true?

A) Gender identity is quite fluid in all children until about the age of 12.
B) Gender identity is generally quite stable from childhood into adulthood.
C) All children with gender dysphoria enter adulthood identifying with the non-natal sex.
D) Gender identity is fixed at birth.

Gender identity is generally quite stable from childhood into adulthood, though there can be some variation and fluidity in some individuals. While children may experiment with gender roles and expression, their underlying sense of gender identity tends to remain consistent. Additionally, not all children with gender dysphoria will necessarily identify with the non-natal sex in adulthood, as some may choose not to transition or may identify as non-binary. Therefore, choices A, C, and D are incorrect.