单击命令按钮执行下列程序，其输出结果是。 Private Sub Commana1_Click（) Dim a As Integer,b As

单击命令按钮执行下列程序，其输出结果是。 Private Sub Commana1_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 End Function Function SecProc(x As Integer,y As Integer,z As Integer) SecProc = FirProc(z,x,y) + x End FunctionA. 20 B. 22 C. 28 D. 30