Calculate the wt% of vitamin C that was present in the solid mixture used to prepare your unknown solution. Report the value as an average with a 95% confidence interval.
a) A: 15.5%, B: 14.2%, C: 16.8%, D: 13.7%
b) A: 13.7%, B: 15.5%, C: 14.2%, D: 16.8%
c) A: 14.2%, B: 16.8%, C: 13.7%, D: 15.5%
d) A: 16.8%, B: 13.7%, C: 15.5%, D: 14.2%