Itard believed that Victor behaved the way he did because he had:

A) been retarded since birth.
B) been malnourished from an early age.
C) been isolated from society.
D) a serious physical illness.

Itard

Refers to Jean Marc Gaspard Itard, a French physician known for his work in education and care of the so-called "wild boy of Aveyron."

Isolated

Being separated from others; in a social context, it refers to individuals or groups having minimal contact or interaction with others.

Malnourished

The condition of having a diet that lacks the correct balance of nutrients, leading to health problems.