Concept:Booting is the startup process that prepares a computer for use by loading the operating system.
Explanation:Booting takes place in two main stages.
First, the computer performs the Power-On Self-Test, commonly called POST.
POST checks the essential hardware components to confirm that they are functioning correctly.
Second, the startup firmware loads the operating system from secondary storage into main memory.
After this stage, the operating system takes control and the computer becomes ready for use.
In the list given in the question, these two required stages are represented as I and III.
Therefore, the correct choice is I and III only.
Answer:B. I and III only