The correct answer is A. The program is much easier to change.
Modular programming is a programming technique that separates the functionality of a program into independent modules. Each module performs a specific task and can be easily reused in other programs. This makes modular programming a very efficient way to develop software.
There are many advantages to modular programming. One advantage is that it makes the program much easier to change. If a change is needed to one part of the program, only that part needs to be changed. This is in contrast to non-modular programming, where a change to one part of the program can often require changes to many other parts of the program.
Another advantage of modular programming is that it makes the program easier to debug. When a problem occurs in a modular program, it is often easy to identify which module is causing the problem. This is because each module is responsible for a specific task, and the modules are not tightly coupled.
Modular programming also makes the program easier to test. Each module can be tested separately, which makes it easier to find and fix bugs.
Finally, modular programming makes the program easier to maintain. When a program is modular, it is easy to add new features or make changes to existing features. This is because the modules are independent of each other, and changes to one module do not affect other modules.
In conclusion, modular programming is a very efficient way to develop software. It makes the program easier to change, debug, test, and maintain.