Answer:
A.Cámara web
Step-by-step explanation:
The question asks you for an important feature when buying a laptop, a contract is not important and is not a feature of a laptop, bandwidth also has nothing to do with a laptop that would be for internet connection/provider, and text messages service would be for a cellphone plan, so the only one that we could assume logically that is a feature of a laptop would be Webcam.