Sejam os conjuntos $$A=\left\{x\in \mathbb{R}\right|\frac{x-3}{x+5}\}\ge 0$$ $$B=\left\{x\in \mathbb{R}\right|\left(x-3\right)\left(x+5\right)\}\ge 0$$ $$C=\left\{x\in \mathbb{R}\right|x-3\ge 0ex+5\}\ge 0$$ Pode-se afirmar que: