If a chief medical officer wishes to determine whether there is evidence that the average DBP in a community is not equal to 150 mm Hg, which of the following types of tests should be conducted?

• A. Either a one-tailed or two-tailed test could be used with equivalent results.
• B. An upper-tail test should be utilized.
• C. A two-tailed test should be utilized.
• D. A lower-tail test should be utilized