prep1-151，这句话怎么理解？

151。
             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

(D)
                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

warning
                    that
                predators
                ignore
                at
                their
                peril

that从句修饰warning的吗？“捕食者在危险中忽略的警告”

可是从整个句面意思上面说不通啊。

请指教，谢谢

这里不是定语从句。是同位语从句，解释这个warning是什么。

即：California
                newt's
                display
                of
                its
                red
                underbelly 是一个清晰的警告，警告的内容是让捕食者忽略这个猎物。