How Does an Interval Estimator Differ from a Point Estimator

Multiple Choice

How does an interval estimator differ from a point estimator?

A) A point estimator may produce very biased results,while an interval estimator never has such a feature.
B) If a point estimator fails to produce an unbiased result,then an interval estimator secures such a result.
C) An interval estimator provides a range of values that always include the estimated population parameter.
D) An interval estimator provides a range of values for the estimated population parameter rather than a single value provided by a point estimator.