Choose the correct description of the graph of the compound inequality: x − 3 < −9 or x + 5 greater than or equal to 12 a: a number line with a closed circle on −6, shading to the left, and an open circle on 7, shading to the right b: a number line with an open circle on −6, a closed circle on 7, and shading in between c: a number line with an open circle on −6, shading to the left, and a closed circle on 7, shading to the right d: a number line with a closed circle on −6, an open circle on 7, and shading in between