A fruitful theory is one thatGroup of answer choicesMakes the most senseMakes the fewest assumptionsMakes conservative predictionsMakes novel predictions

To evaluate the given options for what makes a theory "fruitful," let's analyze each choice:

1. Makes the most sense: This suggests that a theory's clarity and coherence contribute to its productivity. While this is important, "sense" is subjective and can vary based on individual understanding or perspective, which may not be a definitive measure of a theory's fruitfulness.

2. Makes the fewest assumptions: Theories that require fewer assumptions are generally more robust as they are less likely to falter under scrutiny. A theory with minimal assumptions can effectively apply to various situations, making it more versatile and impactful.

3. Makes conservative predictions: While conservative predictions may lead to stable and reliable outcomes, they might also limit a theory's scope and creativity. A fruitful theory may require bold predictions to explore new frontiers of understanding.

4. Makes novel predictions: A theory that can generate new, testable predictions opens avenues for further inquiry and exploration. This characteristic is vital for advancing knowledge and can often be the hallmark of a fruitful theory.

Conclusion

Among the options listed, a fruitful theory most typically makes novel predictions. This quality stimulates further research, experimentation, and discussion, ultimately leading to deeper insights and advancements within the field of study.