The Scientific Method Dictates That Theories Must Be Revised or Elaborated

The scientific method dictates that theories must be revised or elaborated as new observations confirm or refute them.This means that

A) theories should be modified directly after obtaining one set of disconfirming data.
B) theories are modified only as the researchers who implement them go on to other research areas.
C) theories should be modified after a good amount of evidence calls for different predictions than those provided by the original theory.
D) theories are not useful for fueling new research efforts.