The contents of $33$ cans of Coke have a mean of $\overline{x} = 12.15 oz$. We know that the standard deviation is $\sigma = 0.09 oz$. To test the claim that the population mean is $\mu = 12 oz$ you need to use
A. one-sample t-test
B. one-sample z-test
C. none of the above because the required assumptions are not met