请选择ABC4Z:M-@)p3g/x4W'e–_________ ---They are my grandparents.-G5j4c*f'd*b,f6}4a-W4c
A. Who is he?-G5j4c*f'd*b,f6}4a-W4c
B. Whose is this?-G5j4c*f'd*b,f6}4a-W4c
C. Who are they?-G5j4c*f'd*b,f6}4a-W4c