A person's IQ is his intelligence (18) ______ it is measured by a special test The most common IQ tests are run by Mensa, an organization that was founded in England in 1946.
A person's IQ is his intelligence (18) ______ it is measured by a special test The most common IQ tests are run by Mensa, an organization that was founded in England in 1946.
A. how
B. as
C. that
D. so