有下列程序段，其输出结果为( )。
a=0:b=0
For i=-1 To-2 Step-1
For j=1 To 2
b=b+1
Next j
a=a+1
Next i
Print a；b

A．Dim a As Integer
a=array(1,2,3,4)
B．Dim a(),b()
a=array(1,2,3,4)：b=a
C．Dim a As Variant
a=array(1,"asd",true)
D．Dim a()As Variant
a=array(1，2,3,4)