Which of the Following Hypotheses Is Nondirectional

Which of the following hypotheses is nondirectional?

A) A hospital with an infection control nurse will have fewer instances of sepsis among inpatients than will a hospital without an infection control nurse.
B) Greater weight loss will be seen among dieting patients who receive a weekly supportive telephone call from a dietitian than among dieting patients who do not receive a weekly supportive phone call.
C) A difference in the stage of prostate cancer will be seen among men who had an abnormal result from prostate-specific antigen (PSA) screening compared with men who had an abnormal result from digital rectal examination (DRE) screening.
D) Children who receive weekly counselling for 1 year after the death of a parent will perform better in school than will children who do not receive weekly counselling after the death of a parent.