A researcher was interested in improving college students' ability to reduce stress. He took a group of 20 students and randomly assigned each of them to one of four groups, five in each group. The first group practiced yoga postures, the second group listened to music, the third group practiced meditation and the fourth group served as a control. After practicing these interventions for a day, researchers collected scores that measured the student's relaxation levels during final exams.

The researcher wanted to do contrast comparing the average of the Yoga, Music and Meditation groups to the Control group. The coefficients were 1,1,1,-3 (Yoga, Music, Meditation, Control, respectively). They calculated an L=12 and MSw=7.01. What is SScontrast?

• A.5.0
• B.12.0
• C.180.0
• D.60.0