The sentence that best combines sentences 9 and 10 is: "Other scientists are skeptical, saying that it is not possible to prove that animals feel emotion using any standard, controlled scientific methods." This option effectively combines the information from both sentences while maintaining a clear and concise structure.
The selected sentence effectively merges sentences 9 and 10 by combining the information in a streamlined way. Here's a breakdown:
- "Other scientists are skeptical": This part establishes the viewpoint of certain scientists—namely, their skepticism about a particular subject.
- ", saying that it is not possible to prove that animals feel emotion using any standard, controlled scientific methods": This part adds the reasoning behind the skepticism. It explains why these scientists are skeptical, attributing it to the belief that it's impossible to scientifically prove that animals experience emotions through standard and controlled scientific methods.
By combining these elements, the sentence presents a unified idea that links the skepticism of the scientists directly to their stance on the limitations of proving animal emotions through standard scientific methods. This consolidation maintains clarity while conveying the joint information from the original two sentences.