Good afternoon. This is your captain speaking. We have found a strong air current ahead for the next forty miles or so. Passengers are therefore strongly advised to remain in their seats with their seat belts on for their own protection and to avoid use of the rest rooms for time being, if at all possible. During this time, young children should be firmly fastened into their seats.
Please observe these precautions until the seat-belt warning sign has gone off. Lunch will be served after we have passed through the air current zone. Thank you.

When will the passengers be able to get up again（）

A. When an air-hostess says so.
B. When the seat-belt sign goes off.
C. When the captain makes another announcement.