请选择DCBA:U:o.@7dMiss Smith is a friend of____.5G;{(U'g:})G(Z
A. Mary's mother's5G;{(U'g:})G(Z
B. Mary's mother5G;{(U'g:})G(Z
C. mother's of Mary5G;{(U'g:})G(Z
D. Mary mothers5G;{(U'g:})G(Z