As ______ who is a success in business, Mr．White has his own way to deal with various problems．

A．one

B．any

C．all

D．few

某小岛上有着丰富的牧草资源，人们在岛上放养了20000只小白兔，其中基因型VV、Vv和vv的小白兔分别占15%、55%和30%。若此时由于繁殖需要，人们从岛外又将2000只基因型为VV的小白兔放养到岛上，且所有小白兔均随机交配，则F1代中V的基因频率约是（）

A.43%

B.52%

C.48%

D.57%