Recursion can be applied Select one: $)$ a$.$ only when the problem is iterative from large to small. b$.$ only when I have a case for $0$ or $1.$ c$.$ whenever a problem can be solved by dividing it in harder problems where the same algorithm can be used for solving them. d$.$ whenever a problem can be solved by dividing it in simpler problems where the same algorithm can be used for solving them. cross out cross out cross out cross out