Read the dialogue and answer the question.
Cem: Hello, can I speak to the manager?
Receptionist: I'm sorry, the manager is not in the office right now. Can I help you with something?
Cem: I have a complaint about the service. I ordered a laptop last week, but it hasn't arrived yet.
Receptionist: I see. Let me check your order. Can you give me your order number?
Cem: Yes, it's 45892.
Receptionist: Thank you. I'll look into it and call you back.
What is the problem according to Cem?
A)The laptop is defective.
B)The laptop hasn't been delivered.
C)The manager is not available.
D)The order number is wrong.