You have a meeting with a colleague from a different department scheduled for 10:00am. You've spoken to the receptionist and you have been waiting outside the colleague's office for a while and it is now 10:05. You want to make sure the person knows you're there. You:
选项：

A:Peek your head in the doorway and say "Excuse me"
B:Stand near the door where your colleague will see you
C:Continue to sit and wait
D:Enter the office confidently, introduce yourself and remind them you have a 10:00am meeting