In Recursive Backtracking,if One Set of Recursive Calls Does Not

Multiple Choice

In recursive backtracking,if one set of recursive calls does not result in a solution to the problem,what happens?

A) The program returns to a previous decision point and makes a different decision.
B) The program backs up to the previous decision point and throws an exception.
C) The program continues,with unexpected results.
D) The program backs up to the original method call.