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*s+y+3*z End Function Function SecProc(x As Integer，y As Integer，z As Integer) SecProc=FirProc(z，x，y)+x End Function
A．20
B．22
C．28
D．30
