Preparing (3) this program, the Organizing Committee has signed a contract
Preparing (3) _____ this program, the Organizing Committee has signed a contract with Martin - a bicycle-making firm - to purchase 1,000 bicycles, at prices from 850,000 to 1,000,000 VND per bicycle -10% lower than market prices, with nearly 20 different models.
A. for
B. on
C. of
D. about