What is the garnish for a Salty Dog cocktail?

The garnish for a Salty Dog cocktail is a salt rim. A Salty Dog is a variation of the Greyhound cocktail, which typically consists of vodka or gin mixed with grapefruit juice. The distinguishing feature of a Salty Dog is the salt that is added to the rim of the glass, enhancing the drink's flavor profile and providing a contrast to the tartness of the grapefruit juice. This salt rim not only complements the drink but is also a traditional presentation method that highlights the cocktail's name and character.

The other options would not accurately reflect the standard preparation of a Salty Dog. For example, while a lemon twist is a common garnish for various cocktails, it is not part of a Salty Dog's identity. Similarly, cherries are often used in other cocktails like Manhattans or Brandy Sours, but they do not belong in a Salty Dog. Finally, a garnish of "None" would not accurately represent the expected presentation, as the salt rim is integral to the drink's traditional serving style.