A. A bunch of roses will be bought his girlfriend (by Mike).
B. A bunch of roses will be bought to his girlfriend (by Mike).
C. A bunch of roses will be bought for his girlfriend (by Mike).
D. His girlfriend will be bought to a bunch of roses (by Mike).
E. His girlfriend will be bought for a bunch of roses (by Mike).
F. His girlfriend will be bought a bunch of roses (by Mike).