David Has Flown from California to New York for an Interview

Multiple Choice

David has flown from California to New York for an interview. He arrives at the company's headquarters and meets his interviewer, who tells David they'll be going out for lunch.
-They arrive at the restaurant and are seated. Which of the following must be avoided by David?

A) putting his bag or briefcase on the floor or on the back of his chair
B) putting his napkin on his lap
C) following his host's lead when it comes to ordering
D) asking for a doggie bag if he doesn't finish his meal
E) placing the silverware diagonally across his plate after he has finished his meal