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Explanation:the travel services sector is made up of a complex web of relationship between a variety of supplier
It is correct but you could use words that people would more understand.
If you were referring to groceries or things you buy from the store, you could say:
He left all his items on the bus.
He left all his groceries on the bus.
(<em>Your answer is great this is just a suggestion) </em>
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i think the answer is B cause I've had this question before