A health care professional wants to determine whether individuals with hypertension who eat high fat diets have significantly higher systolic blood pressure than the population. The population systolic blood pressure mean is 165 with a standard deviation of 12.The 30 individuals who eat a high fat diet and are tested by the researcher have an average systolic blood pressure of 147, with a sample standard deviation of 6.Is this a one-tailed or a two-tailed test?

A) one-tailed

B) two-tailed

C) cannot determine from this information