Shipley Developed a NEW Test to Measure IQ

Multiple Choice

Shipley developed a NEW test to measure IQ.Using his test,someone with an IQ of 180 would be considered twice as intelligent as someone with an IQ of 90 and someone with an IQ of 90 was three times as intelligent as someone with an IQ of 30.Shipley's test treats IQ as a(n) :

A) nominal variable.
B) interval variable.
C) ratio variable.
D) ordinal variable.
E) none of these choices.