Question

Tengo sed. ¿_____ un vaso de agua, por favor? A. Me trae B. Le traigo C. Me falta D. Quisiera I think it's A?

Answer 1

A sounds correct in context I am thirsty bring me a glass of water please 
you can eliminate B because I am thirsty bring you a glass of water doesnt make sense D can also be eliminated I would like to glass of water please doesnt make sense C also doesnt sound correct because I need is a statement not a question so I would go with A

Answer 2

yes I would go with a also