一道老题，请教高手，please!!

drdr0131

Like the thorny ballooning of a frightened pufferfish or the sudden appearance of angry sapphire hoops for which the blue-ringed octopus is named, so the California newt's display of its red underbelly is a clear warning that predators ignore at their peril.(A) so the California newt's display of its red underbelly is a clear warning that predators ignore at their peril(B) so it is at their peril that predators ignore the California newt's display of its red underbelly, a clear warning(C) the California newt's displaying its red underbelly is a clear warning for predators, so they ignore it at their peril(●) the California newt's display of its red underbelly is a clear warning that predators ignore at their peril(E) it is at their peril that predators ignore the California newt's display of its red underbelly, a clear warning
答案是D，请高手从语法角度解释一下A为什么错，万分感谢！！

xiaolishally

我刚看完这道题,总感觉那个so怪怪的