Explanation : There are three type of scheduler:
1. Short-term scheduler
2. Mid-term scheduler
3. Long-term scheduler
Dispatcher is responsible for handovering the control of CPU to the newly selected process by the Short-term scheduler.
So, option (A) is correct.
Explanation : Software Re- engineering is the examination and alteration of a system to reconstitute it in a new form. In other words, Software Re- engineering is a process of software development which is done to improve the maintainability of a software system.
Option (C) is correct.