Concept:A modern computing machine is defined by the stored program concept, in which instructions and data are both held in memory.Explanation:The stored program concept states that a computer stores both its program instructions and the data it needs in its memory.Because the instructions are stored in memory, the computer can perform different tasks by loading different programs into it.There is no need to modify or rewire the hardware for each new task.This principle is the foundation of the modern definition of a computing machine.Answer:D. stored program