A colleague generates a best-fit line through a set of data points and asks you to confirm its usefulness and goodness-of-fit. You perform a root-mean-squared-error (RMSE) calculation and come up with a very small RMSE value

Based on this value you determine that the best-fit line
A) deviates far from the data points.
B) fits the data well.
C) is useless for interpolation but valid for extrapolation.
D) predicts a value that is too far from the actual value.

B