One brain area that seems to differ between transsexuals and all other individuals is the

Approximately ____ percent of intellectual disability cases can be attributed to known biological abnormalities

a. 5 b. 20 c. 50 d. 80

Which of the following individuals with intellectual disability is most likely to be diagnosed with a form that is due to a known biological origin?

a. Beverly, who has physical handicaps b. Edward, whose family lives in a poor neighborhood c. Sara, whose intellectual disability is in the mild range d. Robert, who was six years old when his intellectual disability was diagnosed