Dividing a Person's Mental Age by Chronological Age and Multiplying

Dividing a person's mental age by chronological age and multiplying the answer by 100 is:

A) Louis Terman's formula for the IQ score as measured by the Stanford-Binet Intelligence Scale.
B) David Wechsler's formula for the IQ score as measured by the Wechsler Adult Intelligence Test.
C) Robert Sternberg's formula for the Practical Intelligence (PI) score as measured by the Sternberg Triarchic Intelligence Scale.
D) Howard Gardner's formula for the Multiple Intelligences Quotient (MIQ) as measured by his Multiple Intelligences Exam.