Correct Option (B)
The passage suggests that Darwinian theory of evolution is not merely a theory but a factual understanding because its explanation for the extinction of species is demonstrably robust. It highlights that organisms become extinct as a direct consequence of environmental pressures or biological challenges, a phenomenon for which Darwin's framework provides a simple, elegant, and convincing account. This strong explanatory power regarding a fundamental biological process elevates its status beyond a speculative theory to an established fact, as indicated by the phrase "Therefore, the so-called Darwinian theory of evolution is not a theory at all. Evolution happens-this is a fact."
Incorrect Options:
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Option (A) it does not satisfy the creationist doctrine: The passage explicitly refutes creationist doctrines, stating they "fail to satisfactorily address" phenomena like species extinction. It does not suggest that Darwinian theory is considered "not a theory at all" because it fails to align with creationist views. Instead, it positions Darwinian principles as superior explanations.
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Option (C) there are no evidences to refute it: While the passage indeed states that "no single zoological, botanical, geological, pale-ontological, genetic or physical evidence has refuted either of the central two main Darwinian ideas," this statement, in isolation, is not presented as the primary reason for the claim that Darwinian evolution is "not a theory at all." Rather, the passage emphasizes the compelling explanatory power of Darwinian theory, particularly regarding extinction, as the basis for its factual status. The lack of refuting evidence reinforces its factual nature but is presented as a subsequent supporting point rather than the direct cause for the initial assertion.
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Option (D) existence of organisms is attributed to a creator: The passage directly challenges the notion that a divine creator is responsible for the existence and subsequent perishing of millions of species. It explicitly contrasts creationist doctrines with Darwinian explanations, thereby rejecting the attribution of life's existence to a creator. Therefore, this option contradicts the passage's argument.