OG详解-OG2 阅读 Q7

Choice B is the best answer because it most logically completes the text’s discussion of the author’s claim about the relationship between Neanderthals and Homo sapiens. As used in this context, “tenuous” means lacking substance or strength. The text states that the author’s claim isn’t convincing because it doesn’t consider certain pieces of evidence—relevant recent discoveries. The context conveys the idea that the author’s claim is weak. 
Choice A is incorrect because the text doesn’t suggest that the author’s claim is “disorienting,” or confusing; rather than indicating that the claim is hard to grasp, the text focuses on the idea that it has a weakness that makes it unconvincing. Choice C is incorrect because describing the claim as “nuanced,” or subtle, wouldn’t make sense in context. The text emphasizes that the claim is unconvincing because it didn’t consider certain key archaeological finds; it doesn’t suggest that what’s in the claim seems subtle. Choice D is incorrect because the text faults the claim for not considering certain key archaeological finds; it doesn’t suggest that the author’s claim is “unoriginal,” or imitative and lacking originality.