If We Discover That There Is a Perfect Positive Correlation

Multiple Choice

If we discover that there is a perfect positive correlation r = +1.0 between the percent of brain damage a person suffered and the number of errors he makes on a test of memory,what conclusion can we draw?

A) An increase in the percentage of brain damage causes one to make more errors on tests of memory.
B) People suffering from brain damage shouldn't be given tests of memory.
C) An increase in the percentage of brain damage is not a predictive factor in tests of memory.
D) Increases in the percentage of brain damage are strongly associated with increases in the number of errors made on tests of memory.