A researcher compared the average time (in minutes) spent exercising over a week for a sample of seniors in an assisted living facility with the average found from a national survey of those over 65 years of age. She reported -15.60, 95%CI (-10.32, -20.96). You can interpret this as meaning ______.

A) there was no difference between the sample and population means

B) we can be 95% confident that the mean difference (15.60) in exercise minutes between our sample and the national average represents a population whose mean difference falls between 10.32 and 20.96 min

C) The sample in assisted living is exercising significantly less than the average senior

D) The seniors in the assisted living facility exercised about 16 min less each week than the national average