Qual a frase correta em inglês para anunciar turbulência aos passageiros?

1. A"We are experiencing some turbulence, please remain seated with your seatbelt fastened."
2. B"The plane is shaking a lot right now, so just sit down and hold on tight, everyone."
3. C"Turbulence has been detected ahead, so you must not move from your seats at any moment."
4. D"There is some bad weather outside the aircraft, so please just try to stay calm for now."