The correct answer is e) A and B.
An algorithm is indeed a step-by-step set of instructions (option a) and can be likened to a recipe (option b) in that both involve following a specific process to achieve a desired outcome. However, a model (option c) is not the same as an algorithm; a model often refers to a representation or abstraction of a system or process, rather than the instructions for how to execute it. Thus, option d and f are not correct.