(单选题, )下面的代码，下面会输出1,2,3的是（ ）
A.for i in range(3): Print(i)
B.aList = [0,1,2] for i in aList: aList[i]=i+1 print(*aList,sep=',')
C.I = 1 While i<3: print(i) i+=1
D.For i in range(3): print(i+1)
正确答案是B