Which Statement Is True About Cross-Validation

Multiple Choice

Which statement is true about cross-validation.

A) A special form of validation is called double cross-validation where the sample is split into halves.
B) It can be used for evaluating the model for chance variations in the data and other problems associated with regression.
C) It examines whether the regression model continues to hold on comparable data not used in the estimation.
D) All of the above statements are true.