Final answer:
The problem with Hannah's research question is that it lacks clarity and specificity, as an effective research question should be open-ended and neutral to encourage a thorough exploration of the topic.
Step-by-step explanation:
The statement that best describes the problem with Hannah's research question is that the question lacks clarity and specificity. An effective research question should invite open-ended responses and should be clear and focused enough to guide the inquiry without suggesting a "right" or "wrong" answer. If a research question can be easily answered with a yes or no, or if it implies the correct answer, it does not foster comprehensive exploration and analysis. Additionally, for a hypothesis to be effective, it should be a tentative assumption that can be tested and is based on preliminary observations. It is not necessary for a hypothesis to be validated by scientific experiments to be considered in research, nor does it need to apply to all situations in the universe or avoid including physical quantities.