The correct answer is A. Modular approach.
A modular approach is a design principle that divides a system into smaller, independent modules. This makes the system easier to understand, test, and maintain. It also makes it easier to add new features or change existing ones.
Proper documentation is also important for good system design. Documentation should be clear, concise, and easy to understand. It should also be up-to-date and reflect the current state of the system.
Conversion is the process of changing from one system to another. It can be a complex and time-consuming process. It is important to carefully plan and execute a conversion to minimize the impact on users.
Long discussions are not necessarily a desirable characteristic of good system design. In fact, they can often lead to confusion and delays. It is important to have clear and concise communication during the design process.
Therefore, the correct answer is A. Modular approach.