Which of the Following Statements Best Represents What Is Known

Multiple Choice

Which of the following statements best represents what is known about the etiology of intellectual developmental disorders?

A) For the majority of intellectual developmental disorders,the cause is well-known and mostly preventable.
B) The cause of most intellectual developmental disorders is currently unknown and may not be completely known in the near future.
C) The cause of most intellectual developmental disorders is genetic.
D) The cause of most intellectual developmental disorders is environmental.