Unlike the Older Intelligence Tests That Used Stern's Method for Calculating

Unlike the older intelligence tests that used Stern's method for calculating the intelligence quotient, current intelligence tests provide an "IQ" score that:

A) is one's mental age as determined by one's performance relative to the average performance of individuals across various age groups.
B) is the ratio of one's mental age to one's chronological age multiplied by 100.
C) is determined by one's performance relative to the test scores of people of one's own age.
D) is based on one's test score relative to the mean test scores of people at different age levels.