Research Findings About the Etiology of Learning Disorders Suggest They

Multiple Choice

Research findings about the etiology of learning disorders suggest they are multifactorial, but according to the text it is generally believed that

A) psychological causes may be implicated.
B) biological causes may be implicated.
C) neither biological nor psychological causes are likely to be implicated.
D) biological causes may be implicated, but secondary to psychological causes.
E) both biological and environmental causes may be implicated.