A gym manger wanted to try three different exercise program to see their effect on weight loss. He randomly chooses 60 customers and randomly assigns them to one of the three different exercise programs. After they go through it he measures the decrease in the weight of each person. What hypothesis test should he do to compare the three programs? A. One mean sigma unknown B. One mean sigma known C. The mean differences using dependent samples(paired data) D. The difference of means using independent samples. E. ANOVA