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Which of the following expressions is equivalent to $-\left(3 x^{2}+5\right)$ ?$\newline$Choose $1$ answer:$\newline$(A) $-8 x^{2}$$\newline$(B) $-3 x^{2}-5$$\newline$(C) $-3 x^{2}+5$$\newline$(D) $3 x^{2}-5$