（加试题）有如下程序段，文本框中输入19后单击命令按钮，则窗体中显示的数字为
Private Sub Command1_Click()
Dim m, n, sum, left, mid, key, s As Integer
Dim a(1 To 13) As Integer
a(1) = 2: a(2) = 3: a(3) = 8: a(4) = 16: a(5) = 19: a(6) = 27
a(7) = 29: a(8) = 32: a(9) = 49: a(10) = 64: a(11) = 72: a(12) = 99
m = 1: n = 12
key = Val(Text1.Text)
mid = (m + n + 1) \ 2
Do While a(mid) <> key And m <= n
If a(mid) > key Then n = mid - 1: left = left + 1 Else m = mid + 1
mid = (m + n) \ 2: sum = sum + 1
Loop
Print sum,left
End Sub

A．1 1

B．1 2

C．2 1

D．2 2