C is correct because the idea is that the prototype EVOLVES into newer better versions during the development process.
Explanation
How well do you know the software development approaches.
A is correct because the structured approach is very time consumming because it is meticulous, and follows a step by step proceedure.
There are 5 approaches Structured End User Agile Prototype Rapid
It is a concept prototype because it is an idea only at this stage
B is correct as users need to be able to adapt a software application to solve his problem