It Is Hard to Measure "Intelligence

Multiple Choice

It is hard to measure "intelligence." To do it the easy way, one can measure the circumference of the head, just above the ears, in inches, and call the result "intelligence." Not only is this method easy; it gives nearly the same number every time one repeats the measurement on the same person. Measuring intelligence this way is:

A) not reliable and not valid.
B) highly reliable but not valid.
C) valid but not reliable.
D) both valid and highly reliable.