Under a time crunch, you only have time to take a sample of 15 water bottles and measure their contents. The sample had a mean of 20.05 ounces with a standard deviation of 0.3 ounces. What would be the 90% confidence interval?

A. (19.88, 20.22)
B. (19.91, 20.19)
C. (19.92, 20.18)
D. (19.75, 20.35)