Eric is a biologically normal 5-year-old boy. However, he is not developing the language skills normal for his age. This disability is referred to as

A) cultural-familial.
B) cultural-isolational.
C) chromosomal.
D) socioemotional.

Cultural-familial disability refers to a learning disability that arises from environmental factors within the family or culture, rather than from biological or genetic abnormalities. In Eric's case, his difficulty in developing language skills, despite being biologically normal, suggests an issue that could be related to environmental, educational, or cultural factors within his family or immediate environment, rather than a chromosomal or socioemotional disorder.