Hi, I did not understand how come the ans of qstn 3 is D. will the sentence 'Skeptics also argue that the fused clavicles (the “wishbone”) of birds differ from the unfused clavicles of theropods' imply that 'Theropod dinosaurs did not have fused clavicles.'? It might also be possible that Theropod dinosaurs have both fused and unfused clavicles but here the comparison is drawn only with unfused clavicles for some reason.
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