For the given scenario, determine the type of error that was made, if any. A new whitening toothpaste advertises four shades as the mean number of shades the toothpaste whitens your teeth. One user claims that the mean number of shades the toothpaste whitens your teeth is less than four shades. The user conducts a hypothesis test and fails to reject the null hypothesis. Assume that in reality, the mean number of shades the toothpaste whitens your teeth is three shades. Was an error made? If so, what type?

a. yes type I error
b. yes type II error
c. no correct decison