Approximately ____ percent of intellectual disability cases can ...

[tth]

Approximately ____ percent of intellectual disability cases can be attributed to known biological abnormalities.
 
  a. 5
  b. 20
  c. 50
  d. 80

Question 2

In 1866, what did the British physician Langdon Down describe for the first time?
 
  a. characteristics of autism
  b. a subgroup of intellectual disabilities
  c. the case of the wild boy of Aveyron
  d. the condition of pervasive developmental disorder

[mrphibs]

Answer to Question 1

Answer: c.

Answer to Question 2

Answer: b.

[tth]

TYSM

[shailee]

Thanks for the timely response, appreciate it