An IQ test has a mean of 110 and a standard deviation of 10. Which is more unusual, an IQ of 120 or an IQ of 99? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. OA. An IQ of 120 is more unusual because its corresponding z-score, (Type integers or decimals rounded to two decimal places as needed.) OB. An IQ of 99 is more unusual because its corresponding z-score, is further from 0 than the corresponding z-score of for an IQ of 99. is further from 0 than the corresponding z-score of for an IQ of 120. (Type integers or decimals rounded to two decimal places as needed.) OC. Both IQs are equally likely.