单击命令按钮时，下列程序的执行结果是 Private Sub Command1_Click() Dim a As Integer，b As Integer，C As Integer a=3 b=4 c=5 Print SecProc(c，b，A)End Sub Function FirProc (x As Integer，y As Integer，z As Integer) FirProc=2 * x + y + 3 * z+2 End Function Function SecProc (x As Integer，y As hteger，z As Integer) SecProc=FirProc(z，x，y)+x+7 End Function

A．20

B．25

C．37

D．32