can someone tell me why the wrong answers are wrong? i picked C but its not right

Plausible though it sounds, the weakness of the hypothesis is that it does not incorporate all relevant evidence.
(A) Plausible though it sounds, the weakness of the hypothesis
(B) Even though it sounds plausible, the weakness of the hypothesis
(C) Though plausible, the hypothesis’ weakness
(D) Though the hypothesis sounds plausible, its weakness
(E) The weakness of the hypothesis which sounds plausible

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