When Luke Was 17 Years Old,his Intelligence Test Score Was

Multiple Choice

When Luke was 17 years old,his intelligence test score was below 98 percent of all test-takers.Now at the age of 23,he needs adult supervision because he is not able to adapt to the normal demands of independent living.Luke most clearly meets the requirements for being assigned a diagnosis of

A) Down syndrome.
B) autism spectrum disorder.
C) intellectual disability.
D) savant syndrome.