The given answer "Disadvantage" is correct because although being able to receive calls from anyone, anywhere in the world may seem like an advantage, it can also be a disadvantage. This is because receiving calls from unknown or unwanted sources can lead to disturbances, spam calls, or even scams. It can also result in increased phone bills if the calls are not included in a free or affordable plan. Therefore, while the feature of receiving calls globally may have its benefits, it also carries potential drawbacks.