Five-year-old Wilbur performs on an intelligence test at a level characteristic of an average 4-year-old. Wilbur's mental age is:

Five-year-old Wilbur performs on an intelligence test at a level characteristic of an average 4-year-old. Wilbur's mental age is:

Five-year-old Wilbur performs on an intelligence test at a level characteristic of an average 4-year-old. Wilbur's mental age is: 



A. 4
B. 4.5
C. 5
D. 80







Answer: A


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