It Is Important for Test Makers to Restandardize the Intelligence

It is important for test makers to restandardize the intelligence tests periodically because

A) the contents of the tests vary widely from year to year.
B) IQ test scores have been rising steadily over the past 50-60 years.
C) the average child today can solve fewer problems.
D) the emphasis on rote learning has increased.
E) children are less responsive to the test than in the past.