7. A marketing analyst randomly surveyed 150 adults from a certain city and asked which type of tooth paste they were currently using - Extra Whitening or Regular (all chose one of these two types). From the results of this survey, the analyst obtained the following 95% confidence interval for the proportion of all adults in the city who are using Extra Whitening toothpaste: (0.52, 0.68). Which of the following is an appropriate interpretation of this confidence interval? A. There's a 95% chance that between 52% and 68% of all adults in this city use Extra Whitening toothpaste. OB. We're 95% confident that between 52% and 68% of all adults in this city use Extra Whitening toothpaste. c. We're 95% confident that between 52% and 68% of adults in this sample use Extra Whitening toothpaste OD. Between 52% and 68% of adults in this city use Extra Whitening toothpaste 95% of the time