[A]. Since then, intelligence tests have been mostly used to separate dull children in school from average or bright children, so that special education can be provided to the dull.
[B]. In other words, intelligence tests give us a norm for each age.
[C]. Intelligence is expressed as intelligence quotient, and tests developed to indicate what an average child of a certain age can do…What a five-year-old can answer, but a four-year-old cannot, for instance.
[D]. Benet developed the first set of such tests in the early 1990s to find out which children in school needed special attention.
[E]. Intelligence can be measured by tests.