When Researchers Had the Same Individuals Take an Intelligence Test

When researchers had the same individuals take an intelligence test that had been developed in 1978 and another test that had been developed in 1947,they found that

A) they scored about 8 points higher on the newer test.
B) they scored about 8 points higher on the older test.
C) they scored about the same on both tests.
D) some individuals scored higher on the old test,and some scored higher on the newer test.