有如下事件过程：　　Function UNC (ByVal x As Integer，ByVal y As Integer) As Integer　　　Do While y＜＞0　　　　sic=x/y　　　　x=y　　　　y=sic　　　Loop　　　UNC=x　　End Function　　以下是该函数的调用过程，该程序的运行结果是　　PriVate Sub COmmand1_Click()　　　　Dim a As Integer　　　　Dim b As Integer　　　　a=12　　　　b=2　　　　x=UNC (a，b)　　　　Print x　　End Sub

A．0

B．6

C．2

D．80

He _____ all that happened to the poor girl and decided to _____ her a favor. [ ]

A. witnessed; ask

B. witnessed to; give

C. witnessed; do

D. witnessed to; find