which phrase best defines a prototype?\no the final product, which has undergone extensive testing and…

which phrase best defines a prototype?\no the final product, which has undergone extensive testing and redesign\no a model that has been redesigned and retested several times\no the criteria established to help solve a problem\no a model from which later versions are developed
Answer
Brief Explanations:
A prototype is an early - stage model from which later, more refined versions are created. It is not the final product, nor the criteria for solving a problem. A model that has been redesigned and retested several times may be a refined version after starting from a prototype.
Answer:
a model from which later versions are developed