When three subsets $A$, $B$, and $C$ exist in the universal set $S$ as shown in the diagram below, which of the following represents the shaded area? Here, each of $A$, $B$, and $C$ indicates the area encompassed by the corresponding circle. $X \cup Y$ stands for the union set of $X$ and $Y$, $X \cap Y$ for the intersection set of $X$ and $Y$, $X-Y$ for the relative complement set of $Y$ in $X$, and $X \oplus Y$ for the mutually exclusive set of $X$ and $Y$. \nThe diagram shows three overlapping circles labeled $A$, $B$, and $C$ inside the universal set $S$. The shaded regions are the pairwise intersections $(A \cap B)$, $(A \cap C)$, and $(B \cap C)$, excluding the central region $A \cap B \cap C$.