3. For any $x, y \in \mathrm{R}$, and $x y \neq 0$, the number of elements in the set formed by $\frac{x}{|x|}+\frac{y}{|y|}+\frac{x y}{|x y|}$ is
(A) 1
(B) 2
(C) 3
(D) 4
B

Translate the text above into English, please retain the original text's line breaks and format, and output the translation result directly.