Consider the following code snippet:Employee anEmployee = new Programmer();anEmployee. increaseSalary(2500);Assume that the Programmer class inherits from the Employee class, and both classes have an implementation of the increaseSalary method with the same set of parameters and the same return type. Which class's increaseSalary method is to be executed is determined by .a) the hierarchy of the classes. b) the variable's type. c) the actual object type. d) it is not possible to determine which method is executed.