Answer:c) Complete
Step-by-step explanation:
The message is incomplete it lacks time and the place at which the sender would like them to have dinner.
The receiver may need to check her schedule and get back to the sender however with this incomplete information she can not even evaluate her schedule to decide whether they can meet or not .
Now the sender will need to call and ask what time and where do the sender desire for them to meet but if there was time and place stated she would have just responded with a straight answer without requesting further information .