请选择ABC1{4W+f'K6m1N ____ he your grandfather?4U;V0z-p:M4n1}9G;N(W0W
A. Be4U;V0z-p:M4n1}9G;N(W0W
B. Are4U;V0z-p:M4n1}9G;N(W0W
C. Is4U;V0z-p:M4n1}9G;N(W0W