An online intelligence test yields a different IQ each time you take it. The test is __________.

A) possibly reliable, but definitely not valid
B) not reliable, and probably not valid either
C) not reliable, but still possibly valid
D) still possibly reliable, and still potentially valid

A test that yields different results each time it is taken indicates low reliability, which means the test is not consistent in measuring what it intends to measure. This calls into question its validity as well, as a test must be reliable in order to be valid. Therefore, B is the best choice.