Kayla Is Mildly Intellectually Disabled, but Shows No Signs of Brain

Kayla is mildly intellectually disabled, but shows no signs of brain damage, inherited metabolic disorders, or genetic abnormalities. However, she was born into an impoverished early environment. Which of the following does this indicate about Kayla?

A) she has organic intellectual disability
B) she has undifferentiated intellectual disability
C) she has familial intellectual disability
D) she has chronic intellectual disability