Suppose data collected by observers at randomly selected intersections across the country revealed that in a sample of 50 drivers, 20 were using their cell phone. a. Give a point estimate of it, the true driver cell phone use rate (that is, the true proportion- or- population porportion- of drivers who are using their cell phone while driving). b. Compute a 95% confidence interval for It. c. Give a practical interpretation of the interval, part b. a. A point estimate for n is b. The 95% confidence interval for the population proportion at is (]). (Round to two decimal places as needed.) c. Interpret this interval. O A. We are 95% confident that the population proportion of drivers using cell phones is inside this interval. O B. We are confident that 95% of the population do not use a cell phone while driving. O C. There is a 95% percent chance that the population proportion of drivers who use cell phones is outside this interval. O D. We are confident that 95% of the population use a cell phone while driving