What information did she confirm about the flight?

The chosen answer indicates that the information confirmed was specifically about the timing of the flight, stating that it was taking off at midnight. This detail is precise and relates directly to the scheduling of the flight itself, which is important for anyone planning to travel. Confirming the takeoff time is essential for passengers to arrange their arrival at the airport accordingly, making this choice a key point of information regarding the flight.

The other options, while relevant to flight information, do not specifically relate to the timing aspect that the correct choice captures. Knowing whether a flight is delayed, canceled, or advising someone to arrive early is valuable, but these do not provide the specific detail about the flight's scheduled departure time. Hence, confirming that the flight takes off at midnight is the most accurate and pertinent information presented in this context.