Final answer:
A testable hypothesis can be developed based on scientific observations, which are objective and measurable. Hypotheses must be capable of being tested and verified or refuted through empirical methods such as controlled experiments or further observations. They are a crucial aspect of the scientific method.
Step-by-step explanation:
A testable hypothesis can be developed based on scientific observations (D). Unlike personal opinions, unobservable phenomena, or subjective experiences, scientific observations are objective and can be assessed through empirical methods such as controlled experiments and observational studies. In science, hypotheses are tentative explanations for observations and must be crafted such that they can be supported or refuted through experimentation or further observation.
For a hypothesis to be considered scientific, it must be subject to verification and testing, which involves making observations that are objective in nature. For instance, the claim that there is a container of milk in the refrigerator is testable by simply checking the refrigerator. It's important for a hypothesis to be precise and as quantifiable as possible to facilitate the scientific method.
An essential feature of scientific explanations is their ability to be tested, as they pertain to the physical world and are validated through objective observations. A hypothesis becomes more credible when supported by evidence, but even then, it is not viewed as an absolute fact, instead, it is considered supported by current evidence and can be revised with new information.