Answer:
Um... I don't understand what this question is saying but I believe the answer is: "The flight attendant told us to fasten our seatbelts."???
The command word is 'Fasten' by the way.
Am. It should be if i were
Salutations!
You can often tell what a word means by its context in a sentence. A context is a specific word or phrase that is followed along the paragraph, it helps you give a slight idea about the word.
Thus, your answer is option C.
Hope I helped (:
Have a great day!