Concept:An algorithm is a well‑defined, step‑by‑step set of instructions for completing a task.
Explanation:An algorithm is not the output of a computer, the data to be processed, or merely a problem definition.
It is a clear and ordered sequence of logical steps that, when executed, solves a given problem.
The key idea is “sequence of steps for solving a problem,” which matches option D.
The other options describe different parts of computing, such as results, inputs, or the problem itself.
Answer:D. a sequence of instructions for solving a problem.