When s is used to estimate σ, the margin of error is computed by using the

A) normal distribution.
B) t distribution.
C) mean of the sample.
D) mean of the population.

When estimating σ using s, the margin of error should be computed using the t distribution. This is because the t distribution takes into account the uncertainty in the estimation of the population standard deviation using the sample standard deviation. Using the normal distribution or the mean of the sample or population would not account for this uncertainty effectively, leading to inaccurate margin of error.