Final answer:
The correct option to complete the sentence is 'cargar'
Step-by-step explanation:
The correct option to complete the sentence is cargar.
In this context, the sentence is asking what the flight attendant helps with when it comes to the carry-on luggage. Out of the given options, cargar means 'to carry', which is the most appropriate verb for the flight attendant to assist with the carry-on luggage.
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