请选择DCBA.j9V._8X0y9j ________ bag is heavier, yours or mine ?;L'z6h'y8t+c2p:a
A. Who;L'z6h'y8t+c2p:a
B. What;L'z6h'y8t+c2p:a
C. Whose;L'z6h'y8t+c2p:a
D. Who’s;L'z6h'y8t+c2p:a