某班有50名学生，出席会议的有49人，这次会议的出勤率是98%______．

下列程序的执行结果为( )
Private Sub Command1_Click()
Dim P As Integer，q As Integer
p=12:q=20
Call Value(P,q)
Print P;q
End Sub
Private Sub Value(By Val m As Integer，ByVal n As Integer)
m=m * 2:n=n-5
Print m;n
End Sub

A．20 12
20 15
B．12 20
12 25
C．24 15
12 20
D．24 12
12 15