A Researcher Investigating the Consumption of Sugar Takes a Random

A researcher investigating the consumption of sugar takes a random sample from the population and computes the mean sugar consumption. He repeats the procedure a number of times using the exact same procedure, and finds the means obtained vary from sample to sample. This is an example of

A) systematic error.
B) sampling error.
C) nonsampling error.
D) noncoverage error.
E) response error.