Researchers are interested in the effectiveness of a new therapeutic methodology at decreasing performance on the Global Depression Scale (GDS). Suppose clinical relevancy in this field would mandate that the methodology needs to decrease a score on the GDS in a clinically depressed individual by more than points. Which of the following represents the correct null and alternative hypotheses for the t test that should be implemented in this investigation?

Ho: _D=0, Ha: _D0

Ho: _D=5, Ha: _D5

Ho: _D=5, Ha: _D5

Ho: _D=5, Ha: _D>5