As a professional airport representative, which of the followings is NOT RIGHT to be done?作为一名专业的酒店机场代表，下列（ ）是不专业的表现？
选项：

A:arrive at the airport 15 minutes before the flight arrival time.
B:Prepare an airport pick-up signage board with guests’ name and flight details on it.
C:pick up guests at an airport in his hotel uniform
D:Play cell phones games at an airport before meeting guests