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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 are developed to indicate what an average child of a certain age can do-what a 5-year-old can answer, but a 4year-old cannot, for instance.
D. Binet developed the first set of such tests in the early 1900s to find out which children in school needed special attention.
E. Intelligence can be measured by tests.
A, B and D do not fit to be the first sentence of the paragraph because of the usage of the words "since then", "in other words" and "such tests" respectively. They need at least one sentence to appear before them.
Between C and E, E fits to be the best starting sentence.
Next comes D as the author talks about what was the first development that was done in "intelligence tests".
D is followed by A as the idea created in D is continued in A.
C and B are a pair and B follows C because the content in B is a rephrase of the content in C.
Hence, EDACB is the answer.
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