1. (2021高三上·浙江开学考) 某对分查找的VB程序段如下：

a(1) = 12

For i = 2 To 10

    a(i) = a(i - 1) + Int(Rnd * 10) + 1

Next i

i = 1: j = 10: c = 0: key = 15

Do While i <=j

    m = (i + j) \ 2

    c = c + 1

    If a(m) = key Then

        Exit Do

    ElseIf a(m) < key Then

        i = m + 1

    Else

        j = m - 1

    End If

Loop

执行该程序段后，变量c的值不可能为（    ）