The correct answer is D. all of the mentioned.
Literate programming is a programming paradigm that emphasizes the importance of writing readable code. It is based on the idea that code should be written in a way that is easy for humans to understand, not just for machines.
There are a number of different techniques that can be used to achieve literate programming. One common technique is to use a documentation language to document the code. This documentation can be used to explain the purpose of the code, how it works, and any assumptions that were made when it was written.
Another common technique is to use a mapper language to generate code from a high-level description of the problem. This can help to ensure that the code is well-structured and easy to understand.
Finally, a reducer language can be used to simplify the code by combining multiple statements into a single statement. This can make the code more readable and easier to maintain.
All of these techniques can be used to achieve literate programming. The best approach will vary depending on the specific project and the preferences of the programmer.