请选择ABC+x.g*X6Q9T0K2i*f.e,F This ____ my mother.*H,h7|5n7|3U-Z8z4X
A. am*H,h7|5n7|3U-Z8z4X
B. is*H,h7|5n7|3U-Z8z4X
C. are*H,h7|5n7|3U-Z8z4X