A team of astrophysicists has detected a series of unusual radio

Question

A team of astrophysicists has detected a series of unusual radio signals from a distant star system. The signals follow a repeating mathematical pattern that does not occur naturally in known cosmic phenomena. Based on this, the scientists conclude that the signals are likely of extraterrestrial intelligent origin.

Which of the following, if true, most seriously weakens the scientists’ conclusion?

(A) The same type of signal has been detected coming from multiple star systems with no known habitable planets.
(B) The radio signals are much weaker than those previously speculated to be possible extraterrestrial communications.
(C) The mathematical pattern observed in the signals is identical to those generated by certain types of pulsars under specific conditions.
(D) The scientists have not yet decoded the meaning of the signals or determined their exact source.
(E) A team of researchers on Earth recently developed an AI system capable of generating similar signals for deep-space communication experiments.

Matty101 · Answer

Could I ask why A is wrong? I see how C could be right. I figured A might be more direct because it shows that the researchers' conclusion isn't the most coherent because we have heard such unusual sounds before, and did not come to the conclusions there must be alien life.

My thinking for why C might be correct is that the researchers' premise for this reasoning is actually the mathematical equations, NOT the unusual sound. So we want to knock the validity of the mathematical pattern.

SHM95 · Answer

I guess the answer is B as the radio signals are not in coherence with the earlier speculated ET signals. "The radio signals are much weaker than those previously speculated to be possible extraterrestrial communications.

Aawere01 · Answer

I agree with C as the answer since if C is true then the whole ET segment can be termed as false. If pulsars are the reason for the signals then there are no ETs involved.

A. Even if this is true this one start system could be an exception. There might be some planets we are unaware of
B. This again is similar to point A. The reason is not strong enough to say the sound is not generated by ET. 
D. Doesn't matter. Irrelevant. Even if they haven't decoded it yet doesn't mean this one is not ET generated.
E. That's an added piece of information but doesn't disrupt the theory that the sound could be generated by ET.

GMATking94 · Answer

this is not the answer as it mentions "  no known habitable planets."

RonWeasley4897 · Answer

I feel A could be wrong because it says multiple star systems, while the premise states distant stars. So, there could be a possibility that the multiple start systems does not specifically refer to distant star systems.

A team of astrophysicists has detected a series of unusual radio

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