The Interval Estimate for Two Values Overlaps

Multiple Choice

The interval estimate for two values overlaps.What might this indicate?

A) Both points may actually have the same value in the general population, although one appears slightly higher, possibly due to uncertainty of the sample.
B) The range between the two points absolutely represents a genuine difference in the general population.
C) Both points must be equal if there is any overlap among their interval estimates because of error in estimating the population from a sample.
D) There is no way to tell if the difference between the two points is genuine.