Concept:Intelligence Quotient (IQ) is a measure of mental ability, calculated as (Mental Age / Chronological Age) × 100. The IQ score determines one's classification.Explanation:The formula is IQ=CAMA​×100.According to the Stanford-Binet scale, an IQ between 90 and 109 is classified as "Average".The table below shows the full classification:
IQ Range
Description of IQ level
Above 130
Very superior
120-130
Superior
110-119
High Average
90-109
Average
80-89
Low Average
70-79
Borderline
Below 70
Mentally retarded/ intellectually disabled
Since an IQ of 100 falls within the 90-109 range, it is considered average.Answer:D. average